See i've heard a lot of bad stories about teh Suzuki GS500, i'd be more inclined to go for a CB500 over that. Bullet proof bikes, almost like the ol C90s
Couriers love them.
I used to use a curvey SV650S for the same commute and would get about 150-170 miles from the tank. Same quality as the bandit, so expect to keep on top of furry bolts in the winter.