I did finish ME second time on PC (first being on XBOX) just to get saves for ME2! The engine improvement are massive comparing both games and the story is as good if not better. You might find controls a bit awkward at the beginning because they changed a lot, especially combat, but after few hours in game it's not a problem.
I can't wait for ME3 now, but waiting is sweet with Witcher 2! Nearly at the end now
. I'm official Troll lover in that game and doing all the side quest along my journey!
Next up might be ... finally finishing GTA IV??