$4.5 k is waaaaaaaaaaaaaay too much to spend on a new bike. Sheeyit, my 3rd bike cost me about that much.

Put about $500-$1000 to the side for gear. Here is a list of stuff that you can select from:
1. Helmet with clear shield and dark smoke shield (the mirrored ones scratch easily)
2. Winter gloves & warm weather gloves
3. Mesh jacket & cooler weather jacket (either leather or textile... ur choice)
4. Motorcycle boots and hiking boots (so that you aren't forced to wear motorcycle boots all the time)
5. Riding pants and armor to wear under regular pants