There's a large battery warehouse in Southern California that sells Trojans and a few other brands of 6 volt batteries at lower costs. They suggested 'US Batteries' brand and we purchased them ( 8 total ). The cost was about 60% the price of Trojans and after 4 years I honestly feel they are performing better than the T105s.

A couple of years ago Evans posted on his problems with warranty on Trojans while traveling and decided to replace them with a generic brand. I'm not sure of this but I believe that he is also pleased with the performance. The deciding factor for him was that since the warranty isn't honored outside the US why get an expensive battery.

You could get Rolls or Trojans but I honestly don't know it their worth it. I'd say, save your money and get a good set of another brand. 6 volt golf cart batteries are available everywhere.