I got my motor for free. It was a hayward powerflo lx 1.5hp. So I got the C900 filter for it which flows 90gph. I have a new 18' round. I only have to filter for an hour, maybe two every other day so far and my pool is around 85 degrees right now. It does an awsome job. The pool is spotless really. I throw the barcudda in every other week. So far so good.

The filter is simple stupid and nothing to go wrong really. Everyone complains about the cartridge costs, but I see them on ebay for roughly $50. My uncle is on his 4th year with the two of his and they look and work fine still. I suspect in the long run the costs are in there with sand. I think they're easier to use, and they filter smaller particles appearently. How hard is it to hose it off two - three times a season? Plus....no water loss from back filling.

I'd get a C700 for that pump and go with it.
Just my two cents.

gpshemi