I have been running a Canadian Tire "72" for the past coupla years... looking to replace it. The vehicle takes a group 26R size. Sears Diehard Gold not available in that size. Walmart up here only sells the Energizer and Optima. I like the Optima RedTop, but the sizing guide keeps recommending that the group 35 will fit. The truth of the matter is the group 35 Optima is an inch bigger than the tray and I will have to drop $200 CDN for it. AC Delco and Interstate are available. Any recommendations?