I buy from The Don regularly (see link above). His ESC's are the same as the UH HobbyWing Pentiums. And his prices are right in line (once you factor in the shipping).
I will be getting a couple more of his 6 amp and 10 amp esc's to go with these new UH outrunners.
Was getting ready to order some more mini-motors from UH, but the new 9 gram and 11 gram ones are already sold out!!!