Okay.. Have you ever ridden before? Do you have any experience on any type of dirtbike, or something similar? What type of driver are you?
Riding is a big responsiblity, not to mention its dangerous. If you have no experience do yourself a favor and start small and cheap. Dont go out and buy a +600cc SS bike because they are cool. We are talking about your life here. Dont let pride get in the way of that.
Look into getting something along the lines of a used Kawasaki 250R or 500R. They are sporty, fast enough to get you in trouble and are still a blast to ride.
Starting smaller
WILL make you a better rider. Throttle response isnt near as touchy, and the power is a lot easier to keep under control.
The other suggestion I have for you is to take the MSF course. Its a great course that teaches you everything you need to know about surviving out there on the streets. I would suggest you take the course before ever buying a bike. They provide the bikes, the helmets, everything you need. You just have to show up.
If you have any questions Ill be more then happy to answer them. Motorcycles are fun, lets just make sure you can enjoy them for a long time!
Check out
www.beginnerbikes.com I would seriously suggest that you look into one of the bikes on this page.