Thanks for all of the responses!. I basically wanted to get a rough Idea, so that I can evalute landing area options at some new sites.
I think 689 touched on what I was trying to get at the best. I'm looking for the best case scenario, based on (since I own their gear) BR's tests.
What is the greatest amount of horizontal flight I can get for every ft. of vertical descent, under perfect conditions. With that # I can estimate (based on the numerous variables at hand) what kind of performance I can expect.
Just to comment: I estimate that with the a generous tail wind and the gear config of the original post, that a glide of 3:1 (or more if the wind is really humming) is possible.
Disclaimer--this is totally my opinion and comes from limited experience.