I'd prefer the first one. I actually already got both, but I can't get the first one to work properly at all in Vista.
EDIT:
Also, I agree with Andy about AVP2. Alien was the most awesome one. The chestburster part was a bit frustrating the first time though. But I liked all the campaigns. It's rather awesome, one game, with three entirely different and streamlined playstyles. Just plain awesome.

Gold, I hope. Can't be fighting the alien hordes without my trust akimbo sidearms.

Could it be finally System Shock 1 and 2 and Planescape Torment??