Looking good so far. Are you planning on running the stock fuel pump w/ the FMU? Look at ignition upgrades as well since you can do them now and minor upgrades are fairly cheap (new plugs/ wires/ MSD Blaster 2 coil).
Might want to check out an oil cooler as well for longevity. FYI you can use 450cc injectors from turbo 1st and 2nd gen 5-speed DSM (Auto's are smaller). you'll need a resistor pack if you go that route.
http://www.cheapturbo.com will be your friend for flanges/misc parts as the need arises.
Best of luck to you though. Sounds like you're definitely on the right track.
- also when you go turbo, you will want to run a colder range plug. I'd reccomend NGK BKR6E-11's.