AMS / AV + would almost certainly be easier than STV, which would require huge constituencies for rural areas (and even under FPTP, there are inequalities in constituency membership because of the difficulties caused by excessive size), but then a whole new can of worms would be opened up concerning how to
set the ratio between corrective «top - up»
MPs, and constituency
MPs, plus a whole load of other factors such as whether to allow
dual standing, whether the two votes should be two choices or interconnected, whether the list should be open or closed, etc., etc..
Microsoft has packed the usual
dual camera
set - up into the Surface 2, with a rear facing 5 megapixel snapper and a really impressive 3.5
mp version up front for Skype chats.