PCM upgrade which one which dealer for Hummer

[mau]

Have an 2000 H1 Hummer, 6.5TD, I want to upgrade the PCM. There are different dealers that sell them and some claim to have different programs. One is by Predator which is suppose to be unique for the Hummer H1. Westers in Canada also has a program. Does anyone have experience with the Westers Program, do they provide most of the upgrades for the US dealers? Also, Does anyone know anything about the Predator program, is it that much better. All opinions are appreciated. Is there mostly one generic upgrade program for these engines or are the programs customized for driving characteristics.?

[Kennedy]

It's no secret that my ECM's are done by Westers. I have a couple of unique requests that he does for me also. I've had pretty good success with these ECM's.