Of the three, the Ultimax or the EPI are the top rated. However as much as I hate to say it, as it is with all other manufacturers, the OE belts are the best. If it were me though...and soon it will be as I still have the factory belt on mine, I will be getting one of the two for-mentioned. If Timken hadn't taken-over Carlisle belts Ultimax wouldn't be a consideration because of a poor past experience but.. I trust Timken...and I do have a positive past experience with EPI belts...and all things EPI. As such will always trust them to put out a quality product. Gates...their carbon belts are OK but there has been too many issues reported for me. In all fairness it may be operator-related caused in most cases though.