You'll like the Limitless, I think. I have 5 or 6 of them. You don't mention which mod you are considering, but with those batteries-- 25Rs are good cells, sound choice-- keep the mod set to no more than 60 watts per battery. One battery, 60 watts; two batteries, 120 and so forth. This will keep you under the maximum amp loading for those cells no matter what coil you put in the topper.