My goal is to have two bikes. One for commuting and the other for long distance. I bought the first '04 because my '05 at the time had about 130 to 140k on it and since I've never owned a bike with that kind of mileage, I couldn't trust it long distance. Then I picked up the 2010,and sold the '05 to one of my sons.
A year later the second '04 came along at a low price, and so I bought it with the idea of selling one of the '04s.
Now, the 2012s are starting to disappear, so I figured I'd buy one and sell two of the others.
My youngest son came by yesterday to replace a tire and oil change and we started talking about him buying the project bike, since I could sell it to him for what he could afford.
I'm not ready to sell the other '04 yet because I have some work to do on it, but once that is done, I'll be selling it as nd be back to two bikes again.
One other thing. For my commute, I need the same accessories as I need for long distance, plus, riding the same type bike allows me to not have to relearn the bikes over every time I swap them out.