Thanks for the continued input guys. I've spent more time than I'd like to admit over at dieselforums and I'm getting a good grip on the different model years, engines, pitfalls, etc.
I'm kind of kicking myself for passing on the 2008 2500HD I originally posted about. Knowing what I know now I think it was a pretty decent deal, and someone grabbed it within a couple of days of it being listed.
I test drove a 2011 Duramax yesterday, checking out a 2006 with the LBZ sometime in the next couple of days (although I think this 2006 looks kind of dated), and looking at a 2008 with crew cab and 2 wheel drive that I found on craigslist tomorrow.
