What’s the best way to play the mega drive today. Plug an original into a TV with an adapter, monitor or go a PC emulator route
If you want to plug into a modern tv and are not fussed about input lag issues then a £30 ish scart to hdmi adapter will do the job, i picked up one for around that price a few years ago and the image quality is nice but the input lag is a bit much for me with games like sonic.
Alternatively if you are willing to spend a bit more (about £60 i think) a RAD2X is a great way to go! I have one for my N64 and its fantastic! image quality is great and I can't notice any obvious input lag with it.
If you'd rather not spend any money on upscalers and the like then a decent emulator with runahead will do the job nicely, this essentially gets rid of any obvious button input lag