I was really disapointed with the '06 STi. I thought for sure they would have done something to increase power to it. Other than the snout they put on the grille it is the same STi that it was in '05. I'd take an '05, but that front just doesn't do anything for me.
The car doesn't have a short throw already? My '05 Legacy GT came with the STi short throw shifter in it. I figured it was just a stock part of the STi that could be ordered seperately to upgrade a Legacy or Impreza. Personally I don't really think it is that short of a throw, but it is shorter than the Legacy GT stock shifter for sure.
A COBB AP is on my list of things to get too. I live in Salt Lake and drive right by COBB every day on the way to work. There is a turbo surging issue that SOA doesn't seem to know how to fix, but COBB has it figured out. If for no other reason I will get one just to fix that problem.