Well we pulled the trigger and purchased a 28'x54" round manufactured by Wilbar. My only issue is the filter choice. The pkg comes with a 1.5hp pump, but I have to choose whether I want a sand, cartridge, or DE filter. Need some assistance on which to choose. Also, what size filter should I be looking for. I read everywhere "the bigger the better". I'm not sure what size they include with the pkg, but the salesman told me we get what is recommended for the the size pool. . Help. :?