My J.River Media Center comes with 40+ visualizations, and support for White Cap and the latest G-Force visualizations but frankly I have no need for purchasing even more visualizations beyond what I already have. My 3D Visualizations are among my favorite. I use my 23" Acer LCD but I also have my HTPC system connected to a 36" Sony XBR CRT via component video that I use for DVD movies. I never really thought about using it for music visualizations but that's a nice idea Ed, I'll have to give it a go.
Cheers,
Robin