You're doing your mods in the very smart order, Handling first! which is rare to see and really the route you should stay on
though I've got some 1500 Grind Delta cams in 01 RS 2.5 heads that are up for sale ... $350 ish
and the Gorilla scoop mounted air intake Adds 10 Wheel hp and 4-5 TQ, and some throttle response . might have some Borla replica headers for sale too ...
I'm sponsored by Gorilla , btw...
and your best best is to get the handling where you want it first, have fun, and decide if you want to spend any $$$ on Hp , which won't affect your times as much as coil overs & sways ...
but figured i'd offer them since i want to sell them, AND they would make your car a little bit more fun to autoX. it would be like a Twin victory ... ...