No clue what Exodia is/was until I read the definitions, but maybe I can add to your thoughts about workbenches. A workbench is probably the single most important "tool" to a woodworker, and yet I'm always surprised by how much we put off making/acquiring a decent bench. I spent a lot of years just making do and getting by. I finally decided to do the research and build my vision of what a workbench should be. Workbenches are as unique as the people who use them. I commend you for taking your time to do it right.
The folks on here have already given you some great ideas. I recommend these books in addition. They were very helpful to me while in the research stage.
Once I finally settled on the type of bench, the type of vises, base cabinet, etc. I drew detailed plans. The first book provides useful information on sizing the workbench to your height and mode of working.
- I wanted a base that was an enclosed cabinet. I have a lot of smaller tools so I chose to fill it with drawers. My theory is that every tool should have a home to go to when it's not being used.
- It needs to be solid and immovable. If you're chiseling a mortise would you want to work on a rock or a trampoline? Likewise, when pushing a plane you don't want to be chasing the workbench across the shop.
- I like attachments and add-ons. These aren't part of the workbench, per se, but they enhance it as needed. Examples include a Moxon vise, shooting board, movable lamp, etc.
My basic design is sort of a split-top Roubo within a framed top. The split top allowed me to make it in two sections and have the half-inch gap for storing tools. The breadboard end caps keep the top perfectly aligned even with seasonal movement. I used a combination of woods, really just what I had on hand. The base cabinet is red oak. The top is hickory with walnut accents, framed with pecan.
Woodworkers sometimes go overboard on the vises. Two are generally sufficient. I chose to add a standard face vise on the front and a wagon vise on the end. The bench dogs are spaced about 4.5" apart. The Craftsman face vise came from of my father's workbench. I made the wagon vise based on a design I found online and the Studley example.
These last couple of pictures show the front and back views. In particular, you can see the attachments I mentioned. I've added these over time as I found a need. They go into storage if I need the space or they are not in use. I like having a lot of options when I work. The upright tool cabinet is the most recent addition. This sits over the tool well holds the tools I use most frequently.
Whatever you decide, let us know. Happy building!