The response from my original post has been fantastic.
The subject of ICON was brought up and I thought I'd share my experience with them. I contacted Jonathan Ward at ICON and set up an appointment with him in his shop in Van Nuys. I flew in and grabbed a rental car and fought traffic for over an hour. When I got there I could not have been more impressed with their shop or the show room. The product is absolutely top notch. Unfortunately I priced out what I wanted and it came in at 178,000. That unfortunately, is simply not possible. On a side note their product is not as customizable as you might think, while pretty much any version LS engine is possible, I mentioned that I would like to see if 37's would work. I was quickly shut down on that as it would "throw off the aesthetic".
Anyway, I've spent this weekend shopping around and it looks like I will be going with a newer version of Suburban - somewhere in the range of 02-07. But that means that I'm going to have to work extra hard to have something completely unique.
This forum has been invaluable to me. I've already made several contacts from members that live around me. I'll be buying lunch for as many as I can to get some plans together on paper. Thanks for everybody's thoughtful responses. I'll keep everybody posted as soon as I make a purchase and then I'll start a build thread. Until then, please keep opining on what is a good idea and what isn't.