Not sure of your age but get several insurance quotes before you buy, seriously. Nothing like buy a nice new R6 and getting a quote for $4,000+ a year.
The new 675s are very, very cool as are the R6s. But if you are going to make a trade in for a penny in for a pound, right? How about an R1??? Stock they are a little down on advertised hp, but oh my goodness the potential with a proper tune.
Or for a bargain liter bike you could get an '08 1125R, only $7995, I did.

The ergos aren't killer either.