All the esc listed by the members here are good esc. You can also try the Skyrc Toro TS 120A esc. It's cheap and really good. As good as my HW V3 and Tekin but cost way lesser...
http://www.skyrc.com/index.php?route...product_id=171
Japanese RC company Gforce sells the same esc but rebranded and cost more. The Toro TS 120A is very popular in Japan too...
http://www.gforce-hobby.jp/products/G0011.html