Retro Gaming Cables has a new line of products. Their line of RAD2X cables are plug and play HDMI cables with in-line modified RetroTINKs. At this time they have 4 offerings:
-Sega Genesis (Model 2 style connector)
-Sega Saturn
-PlayStation
-Nintendo (SNES, N64, Gamecube)
You can also get Turbograx 16 support with the Genesis cable if you have any of the following devices that have a Genesis model 2 connector:
-dbGrafx Booster TTP by db-electronics
-Super SD System 3 by Terraonion
-Engine Block AV (TurboBooster) from Stone Age Gamer
Like the RetroTINK, the RAD2X cables have a toggle switch to enable/disable a smoothing feature. Right now they cost around $50 each. Also, if the console supports RGB video, the cables will default to that video signal first. These cables seem like the best option for someone that does not want to invest in a high end upscaler/line multiplier or if you only have a small number of retro consoles that you want to upscale.
http://retrogamingcables.co.uk/RAD2X-HD ... 3fb4c077bb
RetroRGB's review: https://www.youtube.com/watch?v=DyE85OFGQpM