Well, I think I have it about wrapped up, positioning-wise.
Decided against purchasing an integrated power panel that combined switches with breakers and single-point wiring. Too expensive, but for me, too much space that would have resulted in a jumbled panel.
Decided on placement of switches, spacing, etc. I used an existing panel plan from Zenith as a starting point but then added my own differences.
I'll be able to wire-up the panel and test it before installing in the fuselage.