I've observed that everyone who flys a HoneyBee King2 much seems to upgrade the stock motor pretty quickly, followed by other add ons such as I described above as time and finances permit. One nice thing about it is that there are plenty of different upgrades available - so if you look at what people out here are flying for example, you'll see lots of diversity - but the same basic patterns to their upgrades. Generally these are: brushless motor, ESC, HH gyro, better tail servo, better tail drive pulley, better (programmable) transmitter and receiver, bigger batteries, and sometimes carbon-fiber blades and components. The good news is that you don't have to do all of these on day-1!

Check out the HBK2 Tuner Shop thread for some idea of this diversity: http://www.rcuniverse.com/forum/m_6043372/tm.htm

Enjoy!