I was looking for some suggestions on a good computer buld for around 500$. I play alot of steam games and the latest game I play is Left for dead 2. I have already a dynex 520 watt power supply still new in box (dont know alot abouit this power supply) and a AMD 4850 (Was given to me). I also have a LG 19" LED monitor. IF you wouldnt suggest any of those part let me know. Any Suggestions?!?