Question for the turbo gurus out there

[4seasons69]

My turbo is going to cost more to fix than I would like to spend on a used turbo. I can get a brand new center section for about 950 or map has gt4294 listed on their site for like 1200.
Since the its already getting spendy should I look into going to a gt4202 or should I run the risk chipped exhaust wheel until I can get a billet version of the 4294 or 4202? I would also be willing to go away from the gt42 style turbos for the right one.

Basically I'm looking for your thoughts or opinions on what a good turbo would be that can support upwards of let's say 800 to1000 hp at the wheels at map?

(I have spent lots and lots of time doing research on turbos the last couple months and my brain is on over load right now. Just need a little help. Thanks!)