No no no, please refrain from buying one of those! Save the 22 bucks because all you will get is a bunch of fake Cree LEDs on a cheap board which will most probably burn within the first hour of turbo operation.
Thorfire S70 and Convoy L6 with both around 3800 lumens out of the box are surely the best bang for the buck at the moment, but these lights are quite huge! Another good performer I can recommend is the Jetbeam T6, 4200 Lumens with 4 emitters in a compact size very similar to the Fenix TK75, but less than half the price.
Or wait for the Q8!
Oh you will be hooked soon, I know it 
K.