Having the extra piece of pipe joined say 50cm down from the turbine will cost u more in labour and materials of course... some say they work ok, some say otherwise.
If stock boost is 7psi u should run an intercooler, the exhaust may bump that up to 8psi anyways but u won't know until its on ur car. I'd just keep the air/fuel mixtures fairly rich and make sure a competant show does the mapping... and pay a little bit extra for an ok computer, at least get a chiptorque chip for it... something better a microtech or haltech etc etc.....
The CT26 should be suited to your car, its a fairly big unit and will flow enuf air at 7-8psi to make a great gain around (60-80%) depending on exhaust and other factors.
I'd probably recommend a bigger fuel pump, but a malpassi fuel regulator should be able to provide enuf juice on the original injectors for that power.
I probably should read all trhe posts so far, only gfot thru page 1, ooops... most of this has probably been said already....
ops:
Ohh, clutch will need to be upgraded, soft pieces of pus mazda make.
Anyways, have fun.