Mass Effect (PC)
Dragon Age (haven't heard anything new about this game in a while)
Empire: Total War
Starcraft 2
I don't know about Fallout 3, I have never palyed a Fallout game before, and I definitely will not buy it until three months after release. I'll probably also wait with Empire.
That's about the average time a new game needs to get patched playable and reasonably balanced, and coincidentally also drops in price.
The last game I bought right after release was Civ4 and I learned my lesson, thank you very much.
I will only make exceptions for Blizzard or a new Bioware RPG.