well, are you gonna get rid of the Stang for a Ty? I would probably not advise that on just, "I want a cool fast SUV." If you are truely interested in a Ty and like its performance as well as it history and rarity, then I say go for it. You are going to sacrifice a little bit in time, sweat, and money as compared to a Stang thats 5 years newer.
SyTys can be made into very reliable vehicles, with the right owner. Doing proper ignition, fuel, and regular vehicle work usually results in a fairly trustworth vehicle.
I myself have been left stranded a few times, but oh well, shit happens.
If you do get one, listen to what people have to say, and dont always go with what the first person tells you to do.
Hope that helps in your decision, if not, im sure your REALLY not sure now :grin:. Either way, goodluck.