Im not planning to go the hinged route since I have multiple panels that will need to swap, so I've been thinking about a method to secure them as well. My first try was going to be industrial velcro like the project arcade book uses. If that doesnt work I'll have to try some latch type system with underneath access.
Double roller-catches all round may work for you too - half-decent ones have a surprising amount of grip as rather than latching on the surface like magnets or velcro, the shape of the widened catch head gives good resistance behind the nylon rollers. For a fully-removable modular setup, I'd use 2 on each inside edge (assuming a square box of course).
Cyapps - hinging the front edge is still possible and usually better even with an overhang - you never flip a panel all the way over anyway so raising it to vertical is fine. With your cab design anyway, hinging at the back would likely not work as you have to think of the lifted panel fouling against the monitor glass - here's what I mean if you have trouble visualising:
