i wouldnt suggest anything SSAC. Their may be a few people with good experiences from them, but the majority are bad. Their manifolds break, their turbo's fall apart, and that's something thats gonna cost u money EVERYTIME it happens. the t28 with a boost controller sounds like a better idea than upgrading to a t3/t4. Get a SR side mount instead of the shitty ebay intercoolers (Factory nissan parts will be better quality for sure.) An adjustable FPR would probably be smart for tuning reasons, plus their not that expensive. Im not a nissan expert but the rest of ur set-up sounds good.