Taking a look at your pinball flatpacks, is there a recommended display that drops in these well, with minimal/no visible bezel to the user (for both playfield and backglass)?
really depends on how much work you want to do and how you want to setup the cab.
currently the 2 items on the website are simply the std and widebody width.
For a std cab or widebody you have 3 options
a. a screen size that will fit within the side rails (either cased or decased)
b. a screen size that will sit ontop of the side rails if you notch them
c. a screen size that will fit inside the cabinet if you slot it to accept it.
for a std cab:
a. you are really limited to a 39" max. there was one westinghouse that fit without decasing but its not end of line (EW39T6MZ or EW39T4LZ) pretty much anything else i have run across needs to be decased to fit and depending on the monitor even then maybe not and your left with using a 37"
b. most thin 40's are about the width of the cab (22") so as long as it has even bezel sizes top and bottom it should work fine. I did this with a phillips 40" led. you just need to mind how thick it is and how this works with flipper locations.
c. Again, a larger 39" or even a thin 40 can work. I fitted a 40" samsung in a std pin with minimal slotting (
http://www.samsung.com/us/video/tvs/UN40ES6003FXZA-specs)
for a widebody
a. largest you can go and fit inside the rails seems to be 42" (cased)
b. a 46" can sit on the rails, again like the std pin, need to watch the flipper locations
c. 46" with slotting is the largest you can fit in a widebody. This is a good size as it fills the cabinet and is closest to a real pin size for the table.
With anything other than the 46" you will have empty space beyond the monitor (assuming you bring it down to the lockbar) you would need to either fill that space with a panel or if you slot the cab you can install the flashers beyond in a wall as we often do, or you can shorten the cab length and get custom glass to remove this dead space.
Also when i am talking about widebody we are referring to the std WPC style widebody that you can buy lockbars for, not the super wides of old.
for backglass, a 30" lcd is pretty much spot on but near impossible or expensize to find, a 29" TV is the best for this, you can leave it cased and only need to create a small trim panel or black out a plexi sheet to hide its case.
DMD, either go real with a pindmd or use a 15.6" monitor.
a 29" and 15.6" fit perfect in a std backbox.