If you go SF2T then buy MVC2 also, both are still widely played tournament games, much more so than all the others.
But if you need a stick, the Tekken 6 bundle is worth the 150$ tag.
The Halo francise is the most overrated bland game to ever hit the console market. It provides a bad name to all FPS that even showed effort at creating an original entertaining plot.
I probably have more ps3 games than you :/