I haven't got a chance to play Demon Souls yet, sounds too difficult/frustrating for me. Excellent list! I have seven of those on my list so it seems like we have a similar taste in games. Have you had a chance to play Assassin's Creed II?
A pretty good list. The only thing I'm a little unsure about is Demon's Souls. I know a lot of people seem to be into it, but it just looks like it's way too cruel to be enjoyable. Now, I can sort of get into roguelikes and things like that which can be pretty punishing, but Demon's Souls looks like it goes just a bit too far.
Also you can check out my list if you want to see how our picks compare.