Get the Walbro fuel pump, boost controller and tune next. At that point youll be happy with the power that youre making. ACT clutches have gear lockout at high RPM and if you go with the Exedy, I would suggest getting a twin disc since you like launching so much.
Tuning, i guess you could say its difficult. There is a lot of reading and logging. Start off with logging. See if you can get ahold of EvoScan 2.5 and a tactrix cable. Also buy yourself a wideband. I went with the AEM UEGO and the install wasnt so bad. With this setup you can also log your AFR's on EvoScan. You could also get EvoScan 2.6, but some people are having problems with logging AFR's with it. There is absolutly nothing wrong with 2.5. Here is the link for EvoScan
EvoScan OBDII Mitsubishi MUTII DataLogger Scantool I think its about 25 bucks.
EcuFlash can be downloaded too, but its free.