If you need info about surface drive and you have thick skin go here, other wise stay away from that site.
Prodrive are good in soft bottom mud but hard bottom they will want to bounce on you. Godevil is simple without anything but start and go. Mudbuddy you are on your own. Gatortail will get you out if you know how to drive it.
http://www.mudmotortalk.com/mmt_v2/index.php