So I'm building a new rig and finally retiring my pawn-shop P4 computer. So here are the specs:
Case/PSU - recycling a spare 550W set we have at home (free)
CPU - AMD Athlon 64 X2 7750 Kuma 2.7GHz 2 x 512KB L2 Cache 2MB L3 Cache Socket AM2+ 95W Dual-Core black edition (63.50)
Motherboard - GIGABYTE GA-MA74GM-S2 ($59)
RAM - OCZ SLI-Ready Dual Channel 4096MB PC6400 DDR2 800MHz Memory (2x2048MB) (54.99-20 rebate)
All I need is a good, solid, budget graphics card to slap on this bad boy. Being out of the PC gaming loop for quite a number of years, I'm quite frankly not sure which one to get. Looking at spending around $50-70 on that, and the most I'll probably play on this would be nullDC and Fallout 3 (or Crysis if I'm feeling adventurous

). Help would be appreciated.
Side question: Would it be better to grab that RAM I mentioned above or this one on Amazon:
http://www.amazon.com/gp/product/rebates/B000VY8O6M/ref=dp_rebates_1?ie=UTF8&m=ATVPDKIKX0DER&s=electronicsBoth pretty much cost the same after rebates, but I'm thinking of just grabbing that to avoid the hassle of rebates.