The best place to get UGG boots!?

I've asked all my friends where, but they don't seem to want to tell me. I know Tilly's and Val surf sells them, but I was wondering if their was any other stores or online that might sell them cheaper!! Also for the people that already have them, are they really good and all as i've heard?? Wats the difference also with UGG, Emu Ridge, and Emu?? Please tell me!!! Thankyou