Debating between the 6.0 (preferably already bulletproofed) and a 06-07 LBZ. I know that it has been asked many times before and I have read as many threads on a dozen different websites as I can. I'm wanting to stay away from the dpf systems entirely although I not totally against one of the new diesels with the scr system but they're mainly above what I want to spend. I really like the looks of the 03-07 SDs and I like the cat eyed Chevys (seats are more comfortable too). Both transmissions are pretty solid, although the Allison is a 6 spd vs the 5R110 5 spd. The biggest issue to me is the motors. A bulletproofed 6.0 or a 6.6LBZ. Anyone had both that can give a side by side opinion? I'm probably not going to be hauling stuff real often but frankly my last diesel did spoil me so towing anything with a gas motor just irritates me no end and of course it will be 4x4 (and King Ranch if a PSD).