with the power levels around 350hp, i'd try a t3/04 .60 trim. spools pretty quick and will be able to support what you are looking for. don't hold me to it, but i think they're around $7-800 brand new. depending on where you get it from.

or you could be a baller and go with a gt45r, lol. that will put some folks in the dust when it spools. but i wouldn't recommend it.
its one serious turbo. supposedly supports up to like 1200hp.