Hi,
I found Stapleford to be excellent, Keith Pogmore is an excellent FIC Instructor, plus you get to do the course in a PA28-161 so as well as flying the exercises, you get to sit in the back and watch another FIC student as well.. which I found pretty useful.
I also hear good things about Carol Cooper and co at Andrewsfield.
I didnt find Staplefords location a problem on the course for spinning/stalls etc.. it doesnt take too long to transit to airspace in anyway.
As with any form of training.. I'd recommend going to a few schools, looking around, get a feel for the place etc etc, and go where you feel happiest.
I dont think price is much of an issue as they are all around the 5k area all in.
Loony