For preservation of capital, the GT can't be easily beaten IMO. I did buy a 2nd one (yellow '05 with 21.6 delivery miles and still in the wrapper) purely for investment purposes. I could have already made a tidy profit selling it less than a year after it's purchase, but chose to sit on it instead. I appreciate it's artistic value each time I'm in the garage and look at her sitting on her perch, but the one that really gets me, and anyone else walking into the garage, is the one I drive. She's had a fair bit of work done to her and looks a whole lot meaner and ready to rumble. I strongly disagree that over the long term, the no-miles one will not be worth much more than the driver...I think there will be a very appreciable difference in value between the two, but that's just my opinion. It costs me a whole $730/yr to maintain it, as it's not licensed or insured for the street. My only fear is that letting is sit there over the long term isn't great for the vehicle's mechanicals, but I do what I can to help it.
Except for my real estate ventures, it easily outperformed the rest of my portfolio and - I get to look at a piece of art in the garage rather than the usual boring paper and monthly statements.
If I had to have only ONE of these cars...I'd do what I originally set out to, which was to buy a low miles one, and put on 500-1000 miles /year. Even though I now have 2, my driver still only gets 1-2K miles /year, if that. I want it to be a treat each time I driver her...and time between rides does that for me. Not interested in pounding miles on her; that's what my Viper and Z06 are for.
For pure driving enjoyment, there's very little that will touch it, and even less that beats it. I haven't found one yet. It's a monster in stock trim....one that even most Euro-exotics can't touch. It's as rare as a high quality fine jewel, so it garners a lot of attention out there. Smiles per mile, it can't be beat.