In addition to teh above- i'd keep Off Wipes, small and depending on where you live- a life saver if the bugs are bad. It sounds as if your in a pretty urban environment, Im' in DFW and still carry and use them!

Spare OTC meds too, tums, immodium, pain pills probably wouldn't hurt.

As far as your flashlight goes, i'm a big fan of the Surefire G2 series. You can get an incandescent for 35 bucks, 65 lumens for an hour of run time off Two 123A lithiums. I have since upgraded to the led version-I think they go for around $80. i think its 85 lumens and runs for 11 hours.. very bright and long lasting- I love the nitrolon body- its tough and light! Small powerful light