I think you are having trouble coming up with a plan because you haven't decided what it is you want. Asking other people "what do I want" is going to get you a bunch of "this is what I would do if I were you."
So here is my "this is what I would do if I were you" and you don't have a definite track plan. Make a decision on what your physical boundaries are. Around the room or up against the wall? How wide and how high will your benches be? One level or two? You can sketch this with a drafting compass and scale ruler. This will give you a list of bench work items to plan for and also a check list to use to determine if your track plan will work. You have started a good list of what you want so keep those thoughts going. Don't forget, it's your layout.
