That site Dan gave you is really worth looking at.
I'm searching my brain here to find good two player games, I have lots of boardgames but almost none are very good for 2 players
although Carcassone is pretty good
If you're willing to spend money on it, have a look at this list
http://www.boardgamegeek.com/browser...me&sortby=rank
number 30 Yinsh is well worth it and any game in their top 10 is well worth buying.
I've played quite a few of those and liked almost all of them