G'day guys

I've come up with the great idea of bolting a turbo onto my 89 td42. I'm doing it myself as I'm trying to keep the costs down. I'm just struggling with picking the right one from going all out on an expensive turbo or going with something a bit cheaper that will do the job. I'm wondering what people have used, tried and tested (brands, sizes and all the other stuff) and how they have stood up to the torture or if they have let go just looking at them.

Justin