Well since I have them all and several of each I have to go with the obvious choice for me RC18XX Makes no difference which one IMO. They have the least amount of parts and are hands down the toughest out of the box and the fastest as well. What do you consider best? I consider best being the least needy of upgrades to make it tough and fun. Mini-t's are my favorite and having 8 of them speaks volumes. They do however need a ton of upgrades to make them this way. Xrays are IMO by far the "best" when it comes to the track (oval flat track). However not many people race so it is not the "best" IMO for the general public. Mlst.....well you can be your own boss on this one. I have had several of them in all forms....not my favorite. Detta's are the best on the offroad track IMO. They all out scream and make it look easy. They need lots of attn out of the box to make them tough enough to compete. All in all they are all good trucks. If "best" means for the average kid/guy then RC18XX it is.

Just my $.02

Kevin