The Serpent buggy also has a bunch of upgrades and aftermarket parts available.. I also saw several Durango buggies last weekend at the 1st round of the Georgia State Championship in the PRO class and I wasn't impressed at all! the guys were having all kinds of setup problems getting around some sharp turns and other parts of the track., i read a post not long ago in a euro website a comment that some people feel that the buggy doesn't flex enough!