I just pick up a tube of the "Disk Brake Wheel Bearing Grease" from the local auto parts store. Costs about $5 or so (it's been a few years since I bought the last tube).. ;)
I don't think it really matters 'what' brand you use, as long is it's the correct spec for your rig.. Don't mix brands, so if you do change, make sure you clean out the old grease completely first and then pack with your choice of grease.
That's what's worked for me on my 2002 Prowler Lynx TT and never a issue.. I repack every other year on mine. Just makes me have one less thing to worry about when towing it.. :)
Good luck!
Mitch