Bottom line is this.....
Right now, the two HOT TICKET buggies are the Kyosho and the Mugen. Regardless of which one you pick, they are pricey. Both have a SHITLOAD of hop-ups out there, but, there are few, if any, parts you will want to change. That is, unless you spend a lot of time at the track.
From a lot of the guys who are buggy FREAKS around here, they have said the same thing about the Kyosho. Get either the Inferno MP 7.5 and convert to a KANAI 1 not the 2. or, if you can find one, get the Kanai 1. Why? I dont know.
I have the Inferno MP 7.5 and havent had one bad thing to say about it. Period.
Mugen MBX - well, put it this way, not 1 single Mugen owner has said anything other than 'This is God on wheels' type comments. Just ask RazorBack, he has both a Kyosho and a Mugen and he is all about the Mugen right now. For good reason too!
You still can't go wrong with either one.....