Wow, you know your stuff Trike Lady! The thing with those though is finding ones that are still under valued. The last 75 Limited I looked at was beat and the guy still wanted a premium for it. I say the GL1000 isn't really a collector because you can find ones in decent (not pristine) condition pretty frequently. (Similar to the old BMW airheads except for special ones like the toasters.) I want a GL1000 (garden variety) just because I think they are great bikes and would love having one when I run with my vintage friends. (Assuming I couldn't find an old Moto Guzzi Edorado or Ambassador which have blown up recently.)
Funny how many bikes being mentioned here are ones I lusted after at one time or another -- yours being one of them. I peruse for a Helix or a Pacific Coast regularly because I think they'd be great second bikes. The Drifter was one I really really thought about before the current Indians came out. Now I'd just be embarrassed to be seen on one.
I guess I'm almost shifting subjects here on my own thread and revealing something about myself in the process. For me, just recognizing a bike as a future classic (coupled with a great purchase price) probably wouldn't be enough. For me, it would have to be one I really wanted as well which totally screws with that cool, reasoned, detached thing.