@Maxxpower: I played both Risen, Divinity 2, ME1/2 on the PC and enjoyed them all.
All of these games are supposedly better on the PC (this is second hand, I have not played the 360 versions, just read reviews and I very much doubt there is any noticeable differences) so that might be your avenue if you have a gaming PC (that and they cost 10 bucks less).
I am also one of the few that enjoyed ME 1 more than 2.
As Robo said, Two Worlds is awful but the sequel looks very promising.
Good luck with your Xbox. I repurchased an Arcade for exactly the same reason as you :) RPGs
Playing LO right now and lovin it.