蜜斗

This noodle restaurant is very well-located (middle of Central, very close to SOHO) and is really worth it to try. Dishes proposed there are very original compared to the classic noodle restaurants we can find in Hong-Kong and the price is very affordable - while you are in the heart of Central-. You have also very original honey-based drinks that you have to try if you go there! Service is very good and you can refill the soup of your dish as many times as you want. 
If you'd like to eat very good quality food in Central, at a very reasonable price, before going to SOHO or LKF, I warmly recommend you to try "The Noodle Hive".