I cannot stress lights enough !! I went cheap and bought this
http://cgi.ebay.com/PLANET-BIKE-BLAZ...d=p3286.c0.m14
The Blaze headlight is pretty much worthless for navigating any dark street at 15+ MPH but in flash mode it damn sure gets attention day or night.. I was catching left crosses on a DAYILY basis and have not had even one since installing the light..Both have withstood rain quiet well..RUN THEM LIGHTS DAY AND NIGHT !!!
Good breathable rain can be $$$$$$ ...I again went cheap and bought a pair of these
http://cgi.ebay.com/L-Khaki-Frogg-To...d=p3286.c0.m14
Work great but you will pour sweat if you ride even remotely hard in them..Slow down , take it easy and enjoy the cool rain..
If I had the $$ to spend right now id get a set of racks and bags for the back..The backpack gets heavy when filled with, water, lock/cable, work pants/shirt, multitool, raingear, key, wallet, cell phone..Over 8lbs. in my case..