http://horizononline.com/This company has many stores across the US, and I have always gotten a great price from them. When I built my pond, everything came from Horizon and it was about $1100 shipped, including the 140 pound 15x30 foot Firestone liner. My pump sold elsewhere for over $300, I paid $135. The liner was the best price bar none, and the Savio Skimmer and BioFalls were priced better than anywhere I could find. They go the extra mile for you, and one guy I talked to even recommended that I not order from him because of shipping, and searched for the store closest to me so I could save the shipping charges.
I highly recommend them, and they'd even be willing to set up an account for AP if we get enough interested. I posted this before but got no replies after a couple days...thought I mention it again. When I needed a UV light, he beat everyone else's price too.