Re: Help me pick my next bike!!
There is a HUGE aftermarket for the SV650! On that alone I would reccomend it over the Ninja. I'm going to be honest, I have no experience with a Ninja 650, so I'm going to be 100% biased. With that said, the look of the SV is nicer, and the options are limitless.
That said, most modern sportbikes do have an "aggressive" riding position, but every one's just a bit different so don't rule out a 600 on that alone. Go sit on some. Persuade a friend to let you ride one for a bit, too.
But SV hands down out of your choices.