The Heng Long PZ III or IV are really good. You can't go wrong with either. The PZ III has an amazing selection of aftermarket parts, allowing you to upgrade to metal suspension, wheels, idler adjust and return rollers. Nice thing about this is you can handle the upgrades for less the $100 /upgrade. You will end up spending close to $450, but in smaller bites. Best deal is probably the Tiger. You can get an all metal drive Tiger with metal tracks for $140. Tracks are an issue, but hey it's a Tiger. Everyone wants a Tiger. The new Stug is interesting, but very new, with new electronics. None of us have had a chance to open it up and see what makes it tick, so I would hold off on that for a while.