Maybe you guys have covered this already in another post, but I want to replace my old pump to take advantage of SCEdison's $200 rebate for more efficient pump. I have 15k pool, solar heated, no spa, full sun all day. What HP do I need but more importantly, WHICH ONE? SCE gave a long list of qualifying pumps but I dread having to do the research with no technical knowledge. Am looking for one with most "value"- adequate power, good quality, low price. I don't want to spend more than $500--is there one for me? Would really appreciate if you guys can at least narrow it down to three choices for me. Thanks!