I think the easy way to make sure you have everything you want is just advance preparation. If you think you might want swappable or modular, design your cab with that in mind. To make a swappable cp cab, just make the cp easily removable and add connectors to the wiring harness so it is easy to unplug the entire cp. There is no need to make more than one cp if you are not sure you really want it.
If you want to try modular after that, make one of the swappable CPs so it accepts modular panels. I made my modular panel the same dimensions as the cp on my 4 player konami cab. 3 bolts and the panel is off.
Keep in mind that you don't have to do something just because you can. I have a lot of panels for my cp, but most of the time it is either set up in a fighter layout (mostly for testing and configuring), or a 4-way with 2 buttons.
If I want to play Tron, then it is worth the minute or two to swap the panels. If that seems to be too much work, I will just play whatever works with the panels that are on there.
Having the option to swap those panels is why I enjoy my cab so much.
There is an old, hopelessly outdated thread about my cp linked to the left under my info. I actually like the black panels because they make a good base to show off the controls, so I have never tried to come up with a way to do artwork on them.
My modular panel got expensive really quick because I went crazy buying controls. It doesn't have to be expensive though. The basic build isn't much more than a regular cp; it just takes a bit more work. I have a closet dedicated to storing the panels, but the space is worth it to me.
I just looked at that thread, and it has been almost 4 years since I built the CP! Wow, time flies. I wouldn't worry about the easier to damage concern too much. I have only damaged 2 panels in all of this time by dropping them. They are still usable, but there is an ugly dent on both of them from the MDF hitting the floor. Someday I will mount those 2 controls on new panels, but not a huge priority.
If you do go swappable or modular, try not to go crazy buying controls. Buy them when you decide you need them. I still have enough controls out in the garage to make about 50 more panels, and I never seem to have time to do it. A little bit of a waste there, but someday I will be able to play VS Karate Champ with the original joysticks.
