The best programmer on the market for the duramax is EFILive and PPE hands down. That's what most of the big dog duramax sled pullers and drag racers use.
You couldn't pay me to run Banks on my truck. It's overpriced and overrated. I guess it's ok if all you want to do is pull a trailer.
I have EFILive and love it!
Some good fourms for the Duramax.
Diesel Place - Duramax Diesel Discussion Forums
McRat Racing
__________________
05 2500HD silverado, Duramax/alison, LT, 4x4, CC SB... EGR blocked, PCV re-routed, EFILive, DSP5, MBRP 4" turbo back exhaust
03 chevy silverado RC SB 2wd 5.3L
11's