Sounds like you may be talking yourself into standard dimensional asphalt shingles with a 30 year guarantee. Less cost, no turn off to new buyers and still have plenty of life left in it for the new owners.
Nope, It will look like the original roof or it won't go on. My wife and I both agree. Like our old cars, I won't put a LS in my car but I would use a 318 MAgnum.