Looking for Turbo Upgrade

Alright i got a 07.5 lmm its got EFI,4" turbo back exhaust, banks intake, egr delete and pcv reroute. Iam having troubles with the turbo iam guess its the turbo position sensor and rather than fixing that or a couple hundred i am thinking i will just upgrade the turbo get a little better low end with faster spool. What are everyones suggestions as to a turbo. I will also be upgrading my tc so i shouldnt have to stay within the limits of the stock tc.:charger:

Do you want to stay variable or go fixed vane ?

Iam thinking fixed.

Anyone with a suggestion is welcome to comment. I like the looks of Garrett's Ball bearing turbos iam wondering if they make one that would work with my Duramax. I would like to stay stock size or smaller so I can have some fast spool. Anyone got a favorite fixed vane turbo on a Duramax?

Call hsp diesel, wehrli fab,Fleece Performance, and screamin diesel performance and see what they'd suggest.