The yinding which fudge recommends is a great little light and has fantastic reviews. It definitely one of the better Chinese lights. Gearbest seem to be one of the better chinese companies to deal with. The guys from the MTBR Lights and Night Riding Forum have taken it apart and tested this particular light from the particular seller and can verify its quality. Check out the reviews over on MTBR.
Another light getting a lot of attention over on MTBR Lights and Night Riding forum is the Nitefighter BT40s. There is currently a group buy coupon which brings the light kit (i.e head and battery with charger) down to below $50. It has quality BAK cells and the lighthead is very good quality (better than the usual chinese cree quality). Head over the the MTBR forum and read group buy post and also review posts.