Using bsnes and the CRT-Geom shader and NTSC filter options. Imo it looks as close to what I remember a CRT looking like. CRT Royale is nice but the performance hit isn't worth it plus from what I read it looks the best at 4K.
RIP byuu your work in emulation was great.
Wii is also a very good emulation machine for anything older than N64.
Very easy to pirate stuff, and if you pirate the Wii shop channel versions of N64 games or any other ones you can force 240p output.
Depending on your area you can find a really cheap Wii. I'm not sure if you need a 2gb or less SD for the initial hacking though, which are hard to find these days. After hacking you can use up to 32gb SD card