God I sound like a Honda salesmen. Lol
Have you considered a Honda FL350 Odyssey? They are fast, relitively cheap, safe, fully suspended, and very well documented.
Reliability? It's a Honda. Need I say more. I've yet to see a cart/buggy that can match the performance and features for the price. Not even close to be honest. The chuggys all come with anemic engines(5-6.5hp thank god, the cage isnt safe for much more if that) These are almost 30hp in stock form and can be modified to make close to double that. And it's a 2 stroke! Mines about peaked in the 60hp range. You grab a hand full and it'll make the hair on the back of your neck stand up!

Nothin like a big 2 stroke on the pipe.
Here's years of info on them. MESSAGE BOARD is the forum.
http://www.pilotodyssey.com/