I'm running the new BT03 R/S Race/street tires on my SF.
They get warm quick and stick like glue but the profile is too round and makes the transition slow.
I've only ridden the bike on the track since I installed the new tires so I don't know how they feel on the street.
I just got a flyer from my local parts store and they have BT016's for $200 a set with a 180 rear and $210 with a 190-50 rear
Pretty hard to beat that price and they have them in stock. (but the SF should use a 190-55)
I think you can mail order them too
Clicky
I've used them on both my 1098 and SF and although they aren't the quickest transitioning I think they are pretty good.