trolley: Do you have stock headers or aftermarket? is that turbo 8cm housing.
Could you post dyno graph if you don't mind.

If i was going for punchy street turbo with quick spool time, my pick was td05-18G XT journal bearing. It has smaller exhaust turbine wheel compared to 18G XTR.

I think your right if chasing 350whp a dom/e85 is needed.