[Thor06]

I agree, dont even bother with that Garrett... at very best its the same size as the E316g plus you'd have to get a Garrett manifold and probably a new o2 housing and downpipe.

Nextly, you have a lot of other stuff to worry about before you worry about a bigger turbo. A 3" exhaust should be at the top of your list, followed by a K&N, boost guage, and MBC.

After that, those 550's wont be near enough for you to max out the Evo III 16g. Being that you want to max it out, I would suggest you go the E85 route... so you'll need 850cc injectors or bigger, an AFPR, and a Walbro 255. Also, I dont know what you mean by "FMIC ready" but better intercooling has to come before you get turbo antsy. If you decide to stay on pump gas then a FMIC is pretty much necessary, but regardless of what fuel an upgraded SMIC and hard upper pipe is a minimum.

After that, I'd say its time for some cams before you worry about a bigger turbo, I'd say get some BC 272's or FP2's.

If you still need more power, get yourself a bastard 20g, FP 18g 6SL2, sleeper 16g, 20g, or a 50 trim variant. Believe me though, if those mods you listed are all you have done, you'll be completely suprised once you get your bolt-on modlist rounded out. The bastard 20g is made by SBR, you can find the info on it yourself.