Launch is a good brand.
Buy the Uber pump, then just look at their sacs [
] and decide which measurements are right for you.
DONT get ones with covers because theyre a pain in the arse
you want your boat to be wieghted 40% in front and 60% in back unless you like your wake more nautiqui, in which case put more weight in back or if you like a rampier wake, a little more in front.
weight in FRONT shapes, hardens but will make the wake rampy without enough weight in back
weight in BACK creates a skinier, more inverted wake, but without weight in front, will create a soft mushy wake
WARNING
fat sacs will hurt MPG.
other than that you should be good.