i'm a noob to 4wd but really it comes down to your driving style. if your a belt guy then a shaft car isn't the best car for you. if you race on smooth bluegroove or indoor then a rough track car isn't the best buggy.
i do think all the new school buggies are riding on the backs of yokomo and losi concepts. tamiya durga anyone? thats basicly a japanese verion of the xxx4 only improved. while many rc touring car manufacure can toss offroad suspenion on thier touring car chassis and call it the latest tech in 4wd buggy design is. it's expected in the recent surge in 4wd class.
the best buggy? don't know but yoko and losi were making 4wd race machines while these other guys were making toys
from a design standpoint I like the mr4bx is a work of art.
501x is quality too. the hb cyclone d4 is critisized of copying the bj4 but so what. there is something about the d4 that is just hi grade. the parts seem very high grade. i've heard the buggy turns sharp like a touring car on clay too.
you may laugh at this one but a full option durga is a a-main car. it's one hell of a power sliding beast! in japan durga chassis is taking it's share of wins agains d4's,501x and zx5's. add trf 501x shocks, double slipper, front oneway, cvds and you have a nationals level car.
watch as the db01 owns the track while $500 struggle to keep up!
this is a must see!
best buggy? go with what fits your driving style.