Also, VGA is more expensive on the whole as VGA is made up of 14 cables (only 7 are used) but even so, and VGA takes a heavier toll when being run long distances.
It is possible to turn your S-Vid or RCA into a VGA but not through adapters, as VGA is composite video, and S-Vid/RCA aren't. Marketek makes a cheap(ish) one,
JoyMate Video to VGA ($84.99) that will do it, at a resoloution of 640x480.
They also make cheap(ish) VGA distribution amps, and also send me the same catalogue about 3 times a year...
Nick