Unless you're tied to WWII tanks, I recommend looking at the smoke and sound modern tanks - ZTZ-99, Leopard II or Abrams. If you want something cheap and to just drive around for fun to see if you really enjoy it, then a basic S&S (smoke and sound) HL will be a good way to jump in. A step-up in both quality and price would be the Taigen (same tanks).
The modern tanks are wide with wide tracks and should run well on most surfaces. They also offer plenty of room to work in should you decide to start upgrading things later.