That two bike two everything situation is what I have... but I do it a bit differently. One bike is the commuter, and it has all the bells and whistles... and redundant, redundant lighting. Racks, bags, you name it.

The other bike is my "true" road bike and it has just what it needs to fix a flat and that is about it. No lights, no mirrors, nothing extra.

I enjoy each bike for different reasons.