Try the simple delta. About as quick and simple as they come. 3 - 4 hour build.
I'm running a 1700kv blue wonder, 12A HK esc, 2 x HXT500 servos, 2 and 3S 800mah nanotechs and a 8x4 SF prop. Its certainly not a speed machine like the radjet but it'll show you what delta mixing is all about.
and a link to the RCgroups thread
http://www.rcgroups.com/forums/showthread.php?t=867083
Heaps of scratch building threads on rcgroups, well worth a look if your keen on getting into it. But be careful, this scratch building is addictive!
PS - when you get sick of the stock motor on the radjet, try the 2836 2350KV from hobbyking. My knees are still shaking from my first and only flight with it.