sport bikes(duel sport)


I am looking at these critters and wondering all kinds of things. I've never owned a bike like this so I'd like some opinions. I've always owned HDs.
One piston or two pistons is something I've never considered as the HDs were twins and all my 4 wheelers were single, so in a sport bike what do you folks like.

Brand? egads this could be a bag of worms, but I've looked a wee bit at BMW, Yamaha, Honda and nothing else.

Just want help and opinions.