Re: Boulder, CO Service Recommendation
There is plenty of bulletproofing the 6.0L info and there was a recent thread about Denver diesel mechanics. I'd personally take it to Antero Automotive, they've got great diesel tech and the owner is involved. Call and talk to them about what you've got, what they can do- if they're interested in the work (involves pulling the engine out the front) as it's a small shop.
As far as your van systems, you're welcome to swing by Franktown if you're ever in the area.