Hi,
As I wrote previously, a lot depends on what you are doing. For detail work and using power tools, a higher bench is likely better. For planing, joining wood, and gluing up furniture, I like a lower bench. Because I inlet barrels with mostly hand tools, I prefer a lower bench to save my elbows. Then again, I have the pattern makers vises that raise the work considerably for detail shaping and carving. The flush mounted leg vises and the sliding deadman enable me to firmly hold a stock at an angle so the butt is at shoulder height, very useful for inletting buttplates. The holes in the bench top anchor planing stops and hold fasts, as well as my task lamps that can be moved from hole to hole. The bottom line is I designed my bench and vise arrangements to create a versatile work space and a holding and clamping system. It gets the job done efficiently and saves wear and tear on my body.
dave