When are you going to step up to Google Chrome as your default browser? All the cool kids are doing it.....
Do you have a vise yet? I'm curious to see how that works out.
Are you sure you need the grinder bolted down? Mine has rubber feet on it, and I've never had a need to bolt it down. I do have a bench top drill press bolted down though. My garage is smaller than yours. I'm thinking to free up floor space a workbench attached to the wall that folds down when not in use would be good.
Regarding the fold up benches, do you mean like this: