yea sun enterprises is a good bet, i also got mine from them
on ebay ,i had an issue with the liner when they delivered but they sent a new one,just inspect everything after delivery

and no need to overkill on the pump most you need is probably
a 1 hp pump with a 150 lb sand filter

there is only so much water that can got thought the hose opening so more power doesn't really mean cleaner water

i pieced mine together and have a nice setup if you set up up yourself ,make sure ground is level do not skimp on it

also consider the work,i thought i could do all mine by hand and it was over 2 feet off level from 1 side to the other which means alot of digging me and my brother took a good week to set it up and clear the ground i believe a bobcat would have saved 6 days

good luck