I'm wondering what is the best way to hookup the following systems:

NES
SNES
N64
Gamecube
Wii

I currently have the first 4 systems hooked up via composite cable, and I have my Wii hooked up component.
I don't want to do any mods, so that leaves out RGB connections.
I'm guessing that composite is the best for NES, and S-video for SNES/N64, and component for Gamecube? Is this accurate?