Tire options for 2002 6x4 Gator

I have several of the 6x4 Gators and need a few sets of tires. I have only used the HDAP tires from JD and have had good success on easy trails around my property. I have seen the Carlisle and Titan tires on the web and would like to set one Gator up with an agressive AG. tire type. I currently have the standard 22.5x10x8 front and 25x12x9 rear and would like info on anyone having success with different tire sizes keeping the stock rims. I would like to use at least a 4 ply tire but am looking for some less expensive options.
Thanks for any help
Suffolk Dave