I play strictly ps3, but I bought my Xbox 4 mass effect. I am glad I did because the witcher 2 is stunning. But after playing KoA & DD, I have 1 complaint. There needs to be more grinding opportunities and a less stringent leveling system. It's hard because u are a particular person so customization is strict. Other than that it's near perfect. It's gorgeous, tells a story better than bioware, and the characters are quite unique. Combat can b brutal but mastered, and the end can b a bit easy. CDs projeckt is one of my new favorite companies and I will buy anything they do day 1. Their new RPG, in stamping style looks awesome.
The Withcher 2 is an amazing, near perfect game, if you don't have a 360 I'd suggest you put a $75 gpu in your dual core or better pc and you'll be able to run it at a better framerate and with prettier graphics than the 360 version
or step into pc gaming full force with a sweet rig and see better visuals than next gen consoles will have
90°
60°
50°
40°
10°
20°
30°
Ad 
20°
theres aways the steam version for ten dollars , just crank down a few alot of settings if your pc cant handle it then you will be good to go
I hear its really good like a GOTY type
but alas I only have a ps3
or step into pc gaming full force with a sweet rig and see better visuals than next gen consoles will have
And of course you will be missing quite a few exclusives.
Blizzard is basically the only PC-exclusive developer left. All the former PC only developers like Epic, iD, Valve are on consoles already.
Blizzard games are awesome though.