Originally Posted by
mario2butts
If you don't want to get into RGB/ mods, then yeah, the way to go is composite for NES, S-Video for SNES/ N64, and component for Gamecube/ Wii. S-Video cables that work with SNES/ N64/ Gamecube are easy to find, so that shouldn't be a problem. However, Gamecube component cables are hard to find/ pricey because Nintendo produced them in limited quantities and no third party versions were made. If you want to save some bucks just play GC games on your Wii with its component cables. If you still want to get the best picture from your 'cube, then get some S-video cables for your SNES/ N64 and try them on the GC to see if they're good enough for you; if you're not satisfied, then open your wallet for GC component cables.
Oh, and be aware that newer Gamecubes removed the Digital A/V port necessary for the component cables (they don't plug into the regular SNES/ N64 style A/V port). And, you'll need to keep your regular A/V cables plugged in for audio, the GC component cables are meant to be plugged in alongside them and only carry video.