AREM2326

So at the start of college 4 years ago I bought a prebuilt Cyberpowerpc desktop to serve as my main computer and gaming rig. It has a i7-4790K, 8 gigs of DDR3 ram, and a MSI Z97 PC Mate mobo. About a year ago I upgraded it with a sata SSD boot drive and replaced the GTX 960 that it had with a GTX 1080. I use the PC for running virtual machines, VR, and 1080P gaming (though I want to try 4k soon). I promised myself that after finishing college I would build myself a top of the line rig from scratch to reward myself but now that I am finished I wonder if I wouldn't be better off just upgrading some things. I want to get 16 or 32 gigs of ram (for running more VMs), a better case, a PSU from a reputable brand and possibly a set of raid drives. Would I be OK keeping the motherboard and CPU I already have though? I will be limited to DDR3 RAM, but the computer is still quite fast and I have had no trouble running games or VR since the graphics card upgrade. Are the old mobo and CPU going to hold me back in ways I am not considering? If I upgrade to a 4k or high refresh rate monitor is the old CPU likely to be a bottleneck? Any opinions or advice is appreciated.

I'm actually looking mostly at new cards. I'm a bit scared of getting a dud if I buy used. ?

Hi, everyone So I recently got an HTC Vive and need a new graphics card in order to get the most out of it. I realized that this would be the case when I bought it but was pleasantly surprised that my GTX 960 2gig was able to play a few games. With the RTX 2000 series cards releasing is it a good time to buy a last gen card? ? I'm thinking about getting a 1080 or 1080ti. I have been into tech for years but never payed attention to the "stock market" side of things so I don't know how prices normally behave around a launch. How quickly will last gen cards go out of stock? Will the prices go up around the holidays or should I try to get a good price by waiting for black friday/cyber monday? Just playing Beat Saber for a few weeks won't kill me if I can save 100+ bucks. Thanks for the advice. ?