What res is your 22 inch? See my old thread below. I think your rig will rock it out but that is kind of up to you if it is worth buying it twice to play on the PC. I haven't played it on a console so I don't know how different they are graphics wise and gameplay wise.
Do you have a high res TV that you play the 360 on? If you are playing on a lower resolution TV then just switching over to a higher resolution PC monitor will make it look better.
Thats all I got...I will leave it up to the local trolls to tell you why PC gaming is leetsauce and consoles blow http://www.tomshardware.com/forum/104990-13-battlefield-company-benchmarks-here