If you only had enough $$ right now to do one or the other, which would you do? I know the strut tower brace is an easy self-install, so that's a plus, but what relative perceivable differences do these give (to someone who isn't into autocross exactly)? I know a lot of people talk about what a huge difference they make, but sometimes I wonder if that's just because that's what you tend to say after you spent a lot of time and money putting something on...

Put the SFCs on FIRST.

You start with the foundation...the SFCs are the foundation...for autocross, drag, car durability, safety...

definitely, SFC's first