Well, as promised, I said I'd report back with the tow manners of the truck. Nothing has changed since I lifted it. It still has the slight shudder on take off, but it's minimal. The truck has the two piece driveline and I have not yet shimmed it to try and eliminate the shudder. No big deal.
So far as towing though, it tows great. One of my biggest reservations on lifting the truck was the tow manners since that's all I do with the truck. I absolutely would not hesitate to do another 4" lift for towing applications. Do it. Do it now.