bigger filter means less cleaning- 36 is probably enough for 10k gallons, but 48 would give you an extra 1/3 time between clean/refill, pretty much...
even with the bigger filter, I'd down size the pump- and consider a 2 speed run on low for filtering, only high for water fountains/etc and vacuuming-
on low, consumes like 1/4 power but 1/2 water flow, so on low 2 hours filters as well (sometimes even better) than high for 1 hour, but less total power used to get it there!