Remember that you'll need the Plug for the Z32 as well, so it can wire straight up. I've got a 33 and put an R34 Highflow Turbo on it... If you send off your current turbo to Stao from Hypergear he can highflow it for you, changes all the internals of it to steel wheels etc which can support a lot more boost than the standard one, and machines out the housing so it flows a lot more air. I run a PowerFC with a hand controller, cost me about $1k, plus $500 or so for the initial base tune then a power tune... retunes afterwards are charged per hour.. so only end up being $150-200 or so for little changes. Nistune is a daughterboard which connects into your existing ECU, its cheaper and retains the standard ecu which is good in some ways... as mentioned above, you can get one supplied, fitted and tuned for under a grand.