An Upgrade or Two?

[Drauks]

My current computer is one that I've had a friend throw together for me about 3 years ago. It runs everything fine, but I've recently come to a point where I can afford to spend a little on it. I'm not sure if I would just be fine with getting more RAM or if I should go ahead and pick up a newer video card or if I should spring for both. My budget at the moment is around $200, but I can definitely be patient and wait to save up to spend more.
Here's what I have:
Newegg.com - Antec P182 Gun Metal Black 0.8mm cold rolled steel ATX Mid Tower Computer Case
Newegg.com - Foxconn A79A-S AM2+/AM2 AMD 790FX ATX AMD Motherboard
Newegg.com - AMD Phenom II X4 940 Black Edition Deneb 3.0GHz Socket AM2+ 125W Quad-Core Processor HDZ940XCGIBOX
Newegg.com - Antec EarthWatts EA650 650W Continuous Power ATX12V Ver.2.2 / EPS12V version 2.91 SLI Certified CrossFire Ready 80 PLUS Certified Active PFC "compatible with Core i7/Core i5" Power Supply
Newegg.com - Western Digital Caviar Black WD1001FALS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
Newegg.com - SAPPHIRE 100256L Radeon HD 4670 1GB 128-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card
Newegg.com - CORSAIR XMS2 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory Model TWIN2X4096-8500C5

I'm sorry if that's too link heavy, I'm used to a php board system and the autoparse link kind of throws me off.

 

[Roark]

I would say your best bet is either a:
Newegg.com - XFX HD-687A-ZDFC Radeon HD 6870 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card with Eyefinity
or
Newegg.com - MSI N560GTX Twin Frozr II/OC GeForce GTX 560 (Fermi) 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card

 

[Drauks]

Thanks, will definitely look into that. Also, should I even worry about still having DDR2 at this point?

 

[Roark]

I wouldn't if you're running everything fine.
Upgrading to DDR3 would require a new motherboard, CPU, and possibly a new Windows license if your current one is OEM.