As you can see from my user info, I ride an SV. This is actually my second full sized sportbike, and I couldn't be happier with it. The SV is an extremely user-friendly bike, I think they are one of the best bikes available to beginners. Check out SVRider.com
for more info on these bikes.
The only real concern I have is that the SV is not a short bike, if you're shorter than 5'6 you may have some problems touching the ground!
Other bikes that come highly recommended for starting out are:
(Aprilia RS50, YSR 50 if you want to start out really slow but have a ton of fun doing it!)
Most importantly, take an MSF beginners course and invest in some good safety gear: Helmet, Leather Gloves, Jacket.
And above all, welcome to your new obsession!