The ones I posted where 930's and 135 minutes, although they are a little pricey but I guess it is just relative to what you want. I don't really care about a particular brand, just basically whatever the best mix I can find of CCA, RC, ease of replacement, warranty length, vs price. So to me those aren't a bad buy especially when considering some are $200-$400 a piece.
Is there any reason people switch to group 28's, 29H, 30H, 31's, etc or any other specific styles vs the group 65? I know they are different sizes but do 31's always have a ton better CCA and RC rating then other groups specifically. I know the 28-31's that I listed are technically put as heavy duty commercial 6 cell batteries and group 65's are listed as light duty commerical 6 cells according to the BCI Group Chart, but that doesn't really tell me much.