Doug,
Those plans look excellent. 24x24 is a nice sized garage.
One very minor suggestion: I would think carefully about electrical outlets. I wish I had added some more into my garage. If done "early can lights" over the work bench can be added for reasonable dollars.
I also wish I had gotten the floor stained since it is easier to do at the beginning (less moving, maybe less cost, etc.).
Please show us some pics when it is being built.
