I'd have to go with Jet on this one. When I started into the race scene (thank you Jet) I started with 10th scale, which was nice, but frankly, they can be tough to handle on tracks designed for 8th scale. Got myself a used Hyper 7 and everything changed! Frankly, I find my Mugen MBX5 buggy a bit easier to drive than my Mugen MBX5T truggy.
If he still has them for sale, TalonOne has one or two perfect buggies ready to hit the track, so check that out!