The dual module seems to be the best size vs power solution; it'd offer 1hour (1.5 with SH) and hot swapping to shoot all day. I kind of wish they were cheaper, as it's difficult to justify 3hour bricks for the same price as 1.5hour RVXLs (PLUS ~$1500-2000 RV modules and $300 module adapters...) Even if the batteries were just double the price, that'd be fine (since you're paying for size), but the modules/adapters kind of kill my buzz in terms of affordability...