Website recommendations for pumps and filters

Well, I finally figured out what I want in a pump and sand filter. I decided to ditch the cartridge attempt and opt for a bigger sand filter. Has anyone dealt with internetpoolstore.com or poolstore.com? I found them to be the cheapest, so now I need to know if they are good businesses. Also, please make recommendations of other online sites. Thanks, in advance.

Dave

I've had good luck with A1poolparts.com