Agree with with everything wanna be just said. I'd also add the following:
1. When asking for advice from others, qualify that advice by determining how long and for how many miles they've been riding. You don't take motor rebuild advice from a 4th grader. Don't take bike purchase advice from some guy who "rode my brother's gixxer once. It kicked azz u should get 1 OMG!!11"
2. Come to grips with the fact that you'll drop your new bike on its side at least once, hopefully at low speed. Can you deal with this? It really sucks looking at a rashed bike with 500 miles on it. Consider buying used for your first bike, and looked for something naked. The SV you mentioned earlier can be had fairly cheap used. Plus, your insurance will be a lot less than it would be for a newbie with a new supersport. Buy the new, full-fairinged bike after you have the dropsies out of the way. Also remember that today's 600s make the same power as liter bikes did 15 years ago. They can be...unforgiving.
3. Take some kind of training course. This is the very best thing you can do for your long-term health. A motorcyce safety study called the Hurt Report determined that the most likely crashers were either a) self-trained, or b) taught by friends and family. Check out the Evergreen Safety Council for class times:
http://www.esc.org/Motorcycle%20Training-shell.htm
4. Budget for gear, and wear it. Figure an extra $1000 on top of your purchase price for gear. Road rash really hurts--always wear a helmet (goes without saying), gloves, an armored jacket, riding pants, and good boots. The people wearing shorts, wifebeaters, and flip-flops haven't crashed yet. Asphalt is like a big belt sander.
5. Avoid Cycle Barn.