So i'm building new gaming pc and im looking to hook it up to my 55" rca rear projection tv. I dont have the funds to buy a pc and a new tv at the moment and i really just want to have a pc to play bf3 and other games on rather than my ps3. My ps3 is hooked up to it right now with a component cable so you can get an idea where im at right now. Basically im trying to find out how its gonna look with a decent pc connected with a dvi to component cable and how it will work overall with the refresh rate and what not. The pc will have an i5 2500k, asus/msi 560 ti 1g, 8g of ram and a decent mother board. How much is the graphics card going to matter being that its only 640x480 but its on a 55"? Will it be almost equivalent to an hdtv with a low resolution? I've watched countless benchmarks and other videos on youtube trying to get an idea of how much better it will look than a ps3, but since its going to be on a sdtv and the videos are recorded with fraps im not sure how that will balance out when its on a sdtv. I'm a little new to pc gaming so I would appreciate any info I can get on this set up. Thanks!