I've got 2 Betsons, and I love them both for how I use them. I only have a PC connected and I double up games resolution with 50% scanlines when I emulate, looks fantastic. When I run @ native resolutions, they also look spot on but the scanlines are very pronounced. Not a big deal in horizontal games, but it's a bit distracting in vertical games.
The Billabs I'm sure is pretty fantastic too, but since they're flat screen, they veer a bit from a true arcade feel so I passed on them.
Since the Egret3 and Atomiswave cabs use flat screen monitors, they probably look spot on for the newer games. For older ones, not so much.
Now the WG monitors, there's a LOT of horror stories about them so no matter what you pick, you're doing better than you would with a D9200 (note - there may be worse monitors out there, but I don't pay that much attention).