Thank you for taking the time to write a detailed reply! In this case I use Check this: It looks great on my CRT monitor. Super resolution: It helps a lot because you can have only one resolution that 'fits all', in my case I prefer to have the specific resolution for each console, but it is cumbersome as I have to exit Retroarch and configure my resolution with CRU, each time I wanted to change another console.ДЄlso, I would like to add that you can use a shader to emulate a PVM or BVM, even a Sony Trinitron TV, in Retroarch.

Vsyn swap interval to 2: In my case, I couldn't see any real difference.

Please be aware that, once you see it, you can not unsee it. Can you notice any motion blur, double image, etc? If so, enable it, and increase your monitor brightness.

Am I supposed to use black frame insertion? I think it depends on you.

If not sure, turn on Black Frame Insertion, if you can see the screen flickering, then you are at 60Hz, if yu can't you are 120Hz.

Not sure if running at 120Hz: Go to Settings->Video and check Resolution and refresh rate.Retroarch menu blurry: Are you using RGUI menu (Settings->Drivers->Menu driver)? In my case the menu is blurry but it is completely readable.

Crt emu driver 240p