I believe tanabe also have been releasing a lot of cool stuff for FITs. Used the coilover and it improve the performance, handling and even now my GF ride is much2 more smother.
I believe the quality of its suspension, exhaust, strutsbar etc sometime even better then SPOON.
HKS also buil many cool product for FITs. I heard that they produce the best TURBO kits ever for Honda FITs.. Too bad the price are also $$$