The only consoles you have that will benefit from RGB are the Genesis, SNES and Dreamcast. You can either achieve this by buying their SCART cables and using a SCART to Component transcoder or buying HD Retrovision cables for the SNES and Genesis as well as the RetroGamingCables Dreamcast Component Cable (when it's back in stock). The N64 will need to be RGB modded, but it's expensive (unless you do the mod yourself), plus RGB on the N64 doesn't look that much better than S-Video. So, I think you can get away with leaving that console alone. The Gamecube can only allow Component if you have a DOL-001 model console, which has a Digital AV Out port on the back. You can either buy the Component Cable for it (which is over $200), or buy a GCHD Mk II, which allows you to use a Wii Component Cable instead, along with an HDMI video out. The original Wii is a good option as well. It's video output isn't as good as the Gamecube's, but that can be fixed by softmodding it. I also recommending playing Wii games on the original Wii instead of the Wii U, because the Wii U incorrectly scales them and makes them look blurry, even at 480i/480p. RGB and Component on both the PS2 and PS3 look identical to each other, so you can leave those consoles alone as well. If you're not interested in upgrading your console's video quality, then at least upgrade the Genesis to an RGB/HD Retrovision cable. The difference between Composite and RGB on that console is night and day, it's a much bigger improvement compared to other systems.
