You shuld go with a RB motor in it. I have seen a few of them at some meets here. They say nissan motors are relativly cheep. Also an RB motor fits in pretty easy so I have heard. But I havnt heard an asian say something is hard for them.

All this talk about RB swaps on a TT Z... The VG30DETT is an amazing powerhouse, you basically (actually not basically, literally) have two 3-cylinder turbo engines (dual TB's, DOHC, dual exhaust, variable valve timing except on the 96) The only time I'd swap an RB is if I had a NA Z.