CoutoSH

Dont give empty blank checks to a rando on the internet. How much are you willing to spend? And also, what specific games and also your resolution/framerate target in those titles?

What is your budget

Hey there! I'll start off with some questions:
Would you mind posting which PSU you're going with? Will you be buying additional case fans if the case lacks it, or are you going with what's already included with the case? Any preference for case colors and/or accent colors?  
As for some recommendations...
Fractal Design Meshify C ($89.99 on Newegg): Good airflow but only has 2 x 120mm, options for TG (black & white cases) or Dark TG (black cases only) panels, PSU is hidden. Corsair Carbide 275R ($79.99 on Newegg): Good airflow but only has 2 x 120mm fans, TG panel (but very fragile!), PSU is hidden. DIYPC Trio-GT-RGB ($69.99 on Newegg): Good airflow with 4 x 120mm fans (RGB fans, if that matters to you), TG panels on 3 sides (front, left, and right), and PSU is covered from the top but visible on the sides. (I'm not sure if I'm allowed to post links to other merchants, being new here and all.)
 
As always, be sure to check case specs for any clearance issues. Also note that I've listed discounted prices above, I'm not sure how long they'll be on sale for.

Deepcool Matrexx 70 ADD-RGB, best bang for the buck case, I own it myself!
-$81 USD / $108 CAD
-comes with 4 fans pre-installed
-Support for up to a 360mm Rad in front and another up top
-tempered glass side panel
-tempered glass front panel
-metal PSU shroud with integrated RGB strip
-the only case to have a tinted reflective glass cover for the PSU shroud.
 
Review here:
 

I think you're in need of a Meshify C.

From what I hear the heresy is a cleaner in numbers more clinical amp similar if not the same sounding as the atom. while the 3+ has worse numbers but warmer sounding. Otherwise both are pretty good pick the one that appeals to your tastes. As the numbers on the 3+are pretty good as well. 

Worst comes to worse, you can pawn off the 2070 Super to pay for a new card. Especially if you went with a company that has a "warranty stays with the product, not the person" policy like EVGA, which means you could pawn it off for a higher price than normal.

thx, i guess I'll keep the 2070 super! better be sure than gamble it.

If you want to gamble on the future, sure.

thx ill do more research and post an update if i have any

then you should be set. if you take out the psu from my build, you're down to 1500. also, you might want to check clearences between ram and cooler. the cooler is pretty large and overhangs over the ram slots. might be smarter to go with the Noctua NH-U12S instead.

not sure whether you have case, storage and psu already.
3800x is just a factory overclocked 3700x. no point in getting it.
 
PCPartPicker Part List Type Item Price CPU AMD Ryzen 7 3700X 3.6 GHz 8-Core Processor $419.99 @ Memory Express CPU Cooler Noctua NH-D15 82.5 CFM CPU Cooler $99.95 @ Newegg Canada Marketplace Motherboard Asus PRIME X570-P ATX AM4 Motherboard $189.50 @ Vuugo Memory G.Skill Ripjaws V 16 GB (2 x 8 GB) DDR4-3600 Memory $109.99 @ Newegg Canada Video Card Gigabyte GeForce RTX 2070 SUPER 8 GB GAMING OC 3X Video Card $669.00 @ Canada Computers Power Supply Corsair RMx (2018) 550 W 80+ Gold Certified Fully Modular ATX Power Supply $117.99 @ Mike's Computer Shop   Prices include shipping, taxes, rebates, and discounts     Total (before mail-in rebates) $1626.42   Mail-in rebates -$20.00   Total $1606.42   Generated by PCPartPicker 2020-01-09 10:22 EST-0500    

wow, thx i already got storage (1 NVMe 500Gb, 1 SSD 120Gb, 1 HDD 3Tb) and power supply (750W Corsair CX750M)

I wouldn't upgrade, and definitely not the motherboard.  No increase in performance with a motherboard purchase, it's a foundation for the other parts only.
 
Look at AMD's new stuff, if you need CPU horsepower like you say.  Their CPUs are inexpensive for all the cores/threads you may need.  Otherwise just wait til next year to see what Intel's 10nm and AMD's Zen 2+-^&(*^*R$$^ (their naming scheme is so fucking stupid) are like.
 
basically, skip this generation unless you music production needs grow.

What will the 3800X do for you the 3700X won't?  Or are you caught up in higher number = better?
 
From the Tech religious figure who doesn't exist (hint: no to the 3800X):
 
 

Na even with Amd's so called "binning" i would pick a 3700X over a 3800X heck save the extra on a cooler or a better board or faster memory(will matter way more). 
 
 
Edit please note i own a 3700x haha
 

so i live in the middle of nowhere. cant get a decent hard wired internet connection where i live. so i have a Netgear NightHawk mobile hotspot as my main connection. 
 
i was having a problem with it getting really hot and throttling my speeds to basically unusable, so i cobbled a cooler together. 
 
i ordered some cheap little aluminum heatsinks on aliexpress and cannibalized a case fan and a USB charging cable to make this monstrosity. 
 
it works. 

Ok thanks then yeah Ryzen will be a massive upgrade for you. 
 
Like i said value wise its not worth it for you to upgrade to a 2060RTX. Getting a 3600 and just keep the stock cooler and you will love it, make sure to get 3000mhz+ memory. 

The B450 Aorus Pro has the same VRM as the X470 Aorus Ultra. The X470 would probably have more overclocking features to mess around with compared to a B450. But if all you care about is how strong the VRM is, get the B450 Aorus Pro.