RE: rear sway bar and strut tower brace
I put the bigger sway bar on the rear of my car. It took out a lot of the body roll, but I am paying for it in ride quality. I like it though. I want to auto-cross it, but it's not happening here this year, and I haven't gone out of my way to go where it is. Mainly because of time problems, but also because I want to get some more things done to my car first.
I didn't do the front sway bar because it is too difficult for me to do, and now I'm not sure I want to sacrifice the rest of the ride quality.
I haven't noticed any extreme handling problems, but haven't raced the car. I do take entrance ramps at a pretty good pace, and have slid the car around a little, but it hasn't given me any indication that it wants to break loose.