[Chasnracin]

OK, here comes the question. I currently have a 2006 GMC 2500 HD D/A 4x4 CC LWB. It has 90k on it and is just getting broken in. I love the truck, and the D/A package, specifically the Allison 6 speed. The LBZ is a great engine, but really sucks for fuel mileage, but I can live with that.
Now for the question. I have the chance at a 2004 GMC 3500 with the Duramax LB7 in it. I normally wouldn't consider a backwards trade, but the truck is outfitted exactly like mine and has less than 10k on it, and it shows. I'm not sure I really want to give up my 6 speed package and more HP to step into a 3500. It is a really good deal though. So what do you think? Oh, and it will be pulling a 2011 3400RL, not full timing, just weekend type camping, for now, so minimal weight.