An Apache or Geronimo conversion, vintage Seminole or Duchess would be the most logical choices. Since you are not buying the airplane to go fast, you would want to keep the engines at 4 cylinders a side to save money. Apaches are about the cheapest way to go in this category, but be careful about these airplanes because they are truly old and often are worn out. Engines that claim to be have been recently overhauled may not have been. A friend of mine got burned on a used Apache with falsified logbook entries showing it was recently overhauled, he ended up spending a lot of money to get it done. Also, the gear extension systems on these airplanes can be troublesome, and they do not have counter-rotating props so they are not as easy to learn as later trainers. If you have the money go for a mid 70's Seminole that has clean damage history, or be very careful about an old Apache. IC ALL's sounds pretty good though!