In my sincere opinion, having biked more in the last 10 years than anyone I know and probably even 90% of Mustachians..
Get a bike you like. Be sure it's used, but a good solid foundation that can be upgraded, maintained, cared for.
If you spend an extra $50 or $100 on the purchase or in accessories or in Plasti-Dip to make it look exactly how you want/need...no harm done. ESPECIALLY if you are riding often enough to keep your car parked at home.
Don't go wild, but do fall in love. The 2 wheel life is one of the truest love affairs on this planet.