Yeah, we agree with the "throwing" part, about ozonators; we just differ with your builder about where they should be 'thrown'!

A 550sft filter is much more in line with your pool's size. Just to verify, you have the C5030 shown here: http://www.hayward-pool.com/prd/In-G...1_14001__I.htm ?

Regarding equipment, the consensus here is that either the AutoPilot or Goldline (Hayward) SWCG's are to be preferred. I'm not sure that we have enough info to chose between the Hayward and Pentair VS pumps, other than recommend surge protection . . . LOTS of surge protection. Intermatic has come out with a protector that is listed for pools and spas, unlike many of industrial protectors:
Intermatic PS3000 Pool and Spa Surge Protective Device
I had tried to find some appropriate protectors, but kept running into "I'm not sure; I'll check and get back to you" when I asked if a particular protector was listed for pools. This one is, and comes with a $7,500 warranty on protected equipment. BUT, I have not yet read the warranty, which I'm sure has lots of 'weasel' language: I wouldn't expect to cover more than 1/2 the cost of replacement via the warranty. But, hopefully, if you install 1 or 2 of these, you won't need the warranty. (The protectors themselves are NOT warrantied but are rather intended to 'die first'.)