You can spend money on upgrades on the 60 to get a halfway decent flyer.
If you could get closer to the $500 range you could get an entry level T-Rex in the air. Of course that would be a kit you would have to assemble.
RTF under $400? I have heard good things about the Falcon 3D but have no first hand knowledge.
If you are carefull and shop around you can probably get a pretty good used heli in that price range but I recommend you have someone with experience check it out before buying.