I'm sure you can get that one for cheapWould a GSX-R1000 be a good beginner bike then?
[YOUTUBE]squid[YOUTUBE]
I got my bike and my permit. I rode on a closed street with a friend for about 2 months waiting for the class to start (wait lists are a bitch) going through all the drills they did in class.
I had ridden a LOT of dirt long before I considered a street bike, so the hand/foot controls were second nature and that made a huge difference.
But get a bike that fits you. If the ninja fits, start with it. If you feel comfortable on the SV650, roll that. I don't recommend a dual sport or super moto for anyone because they suck as a commuter and they can teach you bad habits (leg out while turning comes to mind). If you want one as a second bike, then cool. I own a street bike and a dirt bike, both are purpose built.
I am looking at an R1 this weekend in preparation for the advanced class and track days in the Spring.