If you have a Good PC that can handle Mass effect then I dont see why spend $300 or $200 for a 360, when you can play it on your PC which you alrdy have with supirior performance.
If you dont have a PC and you need one then might as well spend money on PC no? see with PC you get to use it for more things and improtant ones such as school work,mail sending,browsing,downloading torrent,office work and best of all you also get to have Mass effect 1 and 2 rather than spending $300 on a 360 just for Mass effect no?