Have installed a kit from Turbokits.com for a mate in Adelaide. (IS200Platinum) I think it would be perfect for what you are looking for. Good quality, complete kit with extra fueling.
He has owned the car since almost new and it had to still drive perfectly like stock with exept with 60% more power. And it does :-) It has a little turbo, decent cast manifold,
discrete intercooler and all piping and heat shielding. Not a beast by any means but a nice, driveable , quick little car.