Looks like you got the lighting all taken care of. If I had to do it over again, I would alter the shape of my house and drop the roof line at the garage wall, creating shorter ceilings. I wanted taller at the time, so I could swing a 4X8' sheet of plywood around without dinging the ceiling drywall or breaking lights. I wasn't thinking about heating it at the time. It's 23 degrees as I type, which is relatively warm for this time of year, its just too much space to heat. I now wish for 8' ceilings.