I think that the utec stages follow Cobb stages meaning what you have listed as stg 3 is really stg 2. I wouldnt recommend a FMIC for the stock turbo. It's not needed and will increase lag a bit.
After going stage 2 if you get tired of the stock turbo I'd recommend getting a 20g turbo, walbro f/p, upgrade your injectors, and either get a FMIC or a larger TMIC. The 20g is probaly the best turbo for your car IMHO in regards to power and lag. Good luck .