that car is clean looking...what a brilliant find!...12k miles is simply brand new
i'd hold off on making any drastic power changes (especially at those prices)...i'd suggest working the suspension through (it's bushings maybe brittle from the decade in storage) and upgrade it to your liking...then maybe the braking system for more bite and less fade
by the time you get these done you might think of a larger engine swap maybe to an integra type r engine (your b16a is worth money so you'll get some back)...in the end it might be much cheaper to do the swap and sell the engine instead of getting an expensive SC
just my $.02