greddy turbo/intercooler

i might buy a greddy sohc kit...the turbo is 15g big....would i be able to put a drag or fmax or any other larger turbo later on?...anyone have this kit...how well does it spool up and how is the performance?...thanks...

the greddy turbo is pretty small, so it spools up pretty quick, but has less top end and runs out of breath faster than a larger turbo.(t3, t3/4)
im not sure if you can bolt a larger turbo to the greddy mani or not though