Caisso's and Kenny's arent that popular mainly because they are comp riders bikes more than street frames, and as most comp riders dont use the forum you wouldnt see them.
Also, as they are un-common no1 has the balls to buy 1 so they just buy a Pitbull.
Kenny £500, Caisso is £450 or £400. NSE stock them.
The Caisso looks and rides really nice, but as i like longer bikes i got the kenny at 1080, just short enough to bunny hop but still long.
If your under like 5'8/7", get the Caisso(1060/65)