Doing a little planning on future modifications and the subject of wheel size came up. What are some of the pros and cons of going from a 15" wheel to a 16" wheel? I get a bit more sidewall with the 15" and there seems to be a bigger selection of tires available. With the 16" I get the 4 1/2" backspacing that I am looking for in the wheel design I like, there is room for a 16" big brake kit, but the selection of tires is more limited. What am I missing here?