This will have to be a car purchased "on faith."
There is no way a dealer will purchase one of these on "spec" given the current economic climate. So if a dealer has one, it's already spoken for, and you will not just be able to walk into a dealer and ask for a test drive of a new SHO. After all, if you just plunked down big bucks on this car (I suspect it will go for list or more at first), would you want everyone and his brother beating the "c**p" out of if before you drove it home? So any SHO a dealer gets, will already be spoken for. They will try to get you to commit by driving a new SLO and saying the SHO will be even better. Before I would plunk down $40K, I would want to drive the car.
If that's your thing, fine, but for me, I'll wait a few years, see what happens, and look at used ones