I was using an old 29" CRT Tv then matched to a Sony and Pioneer DVD player,
but when I upgraded my system to a 42" Plasma, and bought a Pioneer Upscaler,
the difference was really noticeable, whether the connection of the old players would be via S-video or component, the images where sharper and the colors where much vibrant. And at the latest price of the upscalers nowadays, its a worthy investment, esp. if its gonna paired to a nice TV...
good luck...
ABC