I got one of those new Asus G-Sync monitors for my arcade cabinet, got SDLMAME with Timothy Lottes's shader running, and I've been pumping out widescreen bezels for all the 4:3 games. When it all comes together, it's just amazing. Every game runs glass smooth at the refresh rate MAME asks for, the visual quality is great, and I can play both widescreen games and 4:3 games without having big black bars on the side of the screen. When I'm done with the bezels for every game in my cabinet (~150), I'll be releasing all the bezels in a package for people who want them.