I suppose the real answer is whatever type of tire you want. If original you've already seen a few suggestions.
In my case, I bought a car that had been sitting for years, and when it got plopped off the trailer three of the tires were flat. It was fun just getting air in them long enough to push the thing into the garage. So -- one of the very first things I did was make a run to a used tire shop to find something -- anything that holds air, so I can move the car around to work on it. One shop had a set of 4 tires that will fit -- they happened to be truck tires, with white letters. That look grew on me -- to the point where, when it was time to buy some nice new tires, I bought white letters -- and still use them to this day. I figure if the car is ever sold, and the new owner doesn't like them, they're easy enough to replace.