If ya have it drive it... that's my philosophy too, just took the snow tires off mine and have the 14" on there... cars not draggin its butt with the 13" till next winter. ( I took the bags a salt out of the trunk too HA HA!!
I want to score a set of 14's when I find some of that quested-for green money stuff. Right now the 13s make me feel like I'm driving an off-shore oil rig supported by toothpicks.