I agree – check out the Sears outlet store – off Morena near I-5 and I-8.
Also, try Standards of Excellence and negotiate a wholesale price. They have lots of higher end stuff there. I was getting things at 30-50% off the lowest retail internet prices, but I was using a buddy’s contractor account and discount. Maybe you know know a realtor or contractor who would let you use their account at a similar biz-to-biz place.
They have a showroom near the Morena Blvd Costco, but you may have better luck calling a sales guy and giving him model numbers. The less they have to deal with you, the better price you’ll get. Try Steve Kwiatek and boldly ask if you can, as a homeowner, get contractor pricing if you don’t waste alot of his time. http://standardsofexcellence.com/sandiego/