I had a '91 that is still running great. It has 190,000 miles on it and I never had any problems with the brakes other than replacing the pads from time to time and a brake line from the master cylinder to the pump. I changed the fluid a couple of times, but nowhere near every year. I am on my second Allante, a '92 with 92,000 miles and same goes for the brakes. The top is no problem at all. I can raise it and latch it within a few seconds. The problem is with the mini covers if you have them in, and I always do, because you have to go around to the other side to take the right one out.
I also have a '64 Deville convertible and the top is a bear to latch. It takes 2 men to pull it into the holes and tighten the latch. I even broke the latch trying to lock it in place. It takes what seems like forever to get the top out of the boot and up to the windshield. Once, when my son was following me with the '64, it started to rain. We pulled over to the side and started putting the tops up. I had the Allante top up before there was 50 rain drops on the seats and the '64 was just getting to the windshield. We almost drowned before we got it latched.
I have had an Allante since 1994, it is my daily driver and I tow it behind a motor home all winter, and although I have had problems, they weren't any more than any other car I have owned.
Collectible? It would probably be a nightmare if you let it sit for months at a time. It needs to be driven. As far as the wife is concerned, if she can't operate the top, she can't drive it. You would be surprised how quickly they learn how to operate the top without breaking a nail or even scratching the nail polish!
Sodus Point, NY
'64 Deville convertible
'99 Deville d'elegance