Best option for Turbo on stock LBZ

[MaroonLagoon]

Hey guys! Hoping some of you can chip in opinions here. Got a 2007 Classic Duramax that started showing codes pertaining to the turbo. Took it to a shop and they said the vanes are only opening 75% due to the unison ring on the turbo. Short of it is they are telling me to put in a new turbo. My question is if I’m going to go that route should I replace it with the same style factory turbo? Or is there a better upgrade for a stockish duramax?
Stock trans
EGR delete
5 inch down pipe

Codes were
P003A
P0191
P2563

Thank you!

 

[1FastBrick]

If your looking to add to the performance there is a few Options. Other wise get a genuine replacement ether new or rebuilt.

 

[2004LB7]

What about just cleaning the vanes and ring? I've heard of some spraying penetrating oil into them and manually cycling it a bunch of time to free it up