I had a curvy for 4 years and changed it for a thou about 2 1/2 years ago
The sv1000 is not as 'flickable' as the 650 however it has got:-
Much better brakes (ex GSXR750)
Better suspension which combined with a bit more weight gives me loads more confidence in corners
Loooooads more power
Slipper clutch (as good as
)
Get a testride on one if you can - I don't think you will regret it.
I did around 900 miles on mine last weekend and loved every minute (apart from the puncture
)