I need one of each. Can someone recommend one of each that would work well together, thanks.

 

well...for stock mount ICs M2 seems to be good...i have an N-tech hi flo cat thats been good to me, and an apexi power fc that i really like...dunno bout boost controllers though...

 

Intercooler depends on your personal preference. If you plan to just street, some drag, some track events, you might want to look at the M2 med... If you like to drag race alot and don't do the road races, the look at a FMIC. Either way, anything is an upgrade over stock.
Boost controller is an easy one. The best one for the FD is the Greddy Profec B, hands down.
High Flow cat is again your choice. RP makes a nice one, but then so do many others like N-tech.
ECU, I recommend not going the cheap route on this one. This will be your most important investment. Go with the AEM, Haltech, or Power FC.
Good luck.