I have never worked with my bench up against the wall, because I like to work from all 4 sides of my bench. I do like my machines pushed up against the wall and a large open space in the middle of the shop to facilitate easier movement. I have a Minimax combination machine so by necessity my tablesaw and jointer/planer are bundled together but I would actually prefer they not be (like a Felder machine that breaks apart). I would never put my tablesaw central in my shop, always at one end with a clear entry and egress for the sliding table, space permitting. Putting a tablesaw in the middle always struck me as one thing I’d always have to walk around and/or fight the temptation to stack stuff on it.
My shop ended up being 23 x 19 feet, for a total of 437 square feet. I put my wood rack in the basement, but outside the walled in shop area. To keep the dust in the shop, a three part strategy was employed. I have a dust collection system, an air filtration system and a shop vacuum for cleaning dust out of machinery. I put up new walls, installed new electrical service, lighting, and two access doors for ease of materials movement. The shop includes two windows so that I can enjoy natural light, and not feel like I am squirreled away in the basement.
Unless you’re a big fan of frequent shop remodeling, planning the layout of your workshop early in its development will save you a lot of time and trouble and also can keep you from spending years in an uncomfortable, poorly organized space. And if you already work in a shop that’s as organized as a trailer park after a tornado, careful planning and a little remodeling is likely to help you make a quantum leap.