Tamiya has had good success with its TT-01 Shaft Driven 4WD system and they are pushing out some nice new body combos.
The kits usually require a Radio and a Servo but can be usually had for nicely under 200 bucks so you can build it the way you want. I am thinking we need to pick up a bunch of these and start a spec class running a 17.5 or 13.5 motor/esc combo?
Tamiya New Releases for the TT-01 Platform gallery
Tamiya… Tamiya… Tamiya…. Tamiya…