OmniTaff

I don't think there would be much point in upgrading. The i7 950 still seems like a capable CPU, I'm sure that it will still work just as well as a low end Ryzen CPU, although I can't say how much longer it would last. I would suggest just use it until it dies, then worry about getting Ryzen.
Maybe get 8GB of RAM.

Hello All,
Built this bad boy last week, thought I'd post it up. 
Ryzen 3700X CPU;MSI Nvidia RTX 2070 Super GPU, X470 ProGaming Carbon Mobo, 32 GB Corsair Vengaince 3200Mhz DDR4 RAM, ADATA 1TB 8200 pro, m.2 SSD  Cooler master M530P Case along with corsair ML360 AIO Liquid cooling;  1x 500GB sata Westerndigital Blue SSD + 1x 500GB M.2 Westerndigital Blue SSD. Corsair 850 W rm850x.  Acer predator 34' Monitor , Logitech Lightspeed G502 Mouse. 
 
Very happy with the build. Joined the opposing team this time round. Just waiting for games that I want to play to come out so i can give this bad boy a better test run . 

if i had to guess you may need to preform a bios update for that board to work with the 9th gen chips