Will you be a casual, recreational rider, or a more performance oriented rider? Do you want to ride in an upright position, or bent forward?
It may be helpful to check out the Trek and Giant websites, or others, to see what's available in different types of bikes. You should be able to get something nice with your budget.
I have a Trek 7100 WSD for riding around the neighborhood and I'm pleased with it. I stressed too much about which bike to get. Find one you like, and that fits, and go! Good luck with your purchase.