What exactly do you mean by a tune? I would start with a turbo tweak chip and do it yourself.... Unless you are talking about swapping all of the fluids and the spring cleaning stuff.
Conley's idea of a tune was turn the boost down until it stops knocking... lets just say I was not satisfied with mine when I started tuning it myself and realized that I was missing out on roughly 40hp...
Get a scan master, get a TT chip, and if you really want a good tune then buy an LC-1 wideband and do it all yourself... it really is not very complicated once you get to know your car.