I won't mention the GS since the question is regarding the best piece of equipment...
#1 Heated Corbin Saddle, riding comfort is all-important
#2 iPod with Etymotic eR6i in-ear headphones and AirClick remote control
#3 Shoei X Eleven helmet
#4 Sidi Strada boots
#5 Aerostich AirVantage heated vest
GSW or GSAW soon...