First, you should go take the MSF course instead of buying a bike. After that, you should look at something like the Ninja 250 or 500 or 650, or the SV650 - something along those lines. Stay away from the CBR600, GSXR600, R6, etc. for your first bike. Make one of those your second bike. Buy used for your first bike because you will drop it, no matter how careful you think you'll be.
"We didn't trade shoves; I did all the shoving." -Bobby Knight, 1981