I suggest you start your research on these devices at
www.toolsforwellness.com compare and decide what you want from the devices
Since you have already called them 'silly' in your topic header I you seem to have decided that they are useless already.
I use the proteus. I chose that one because it does binaual beats, is programmable and ready to be updated with its flash memory.
Works well on its own and works even better with a tape or CD... for this I find paraliminals an excellent choice. I just choose an appropriate setting. In fact I enjoy listening to paraliminals with the L&S device although the paraliminals definately does not require device. I've even let the voices on the tapes set the beat of the lights. If I want I just listen to the tape or CD and only use the light glasses for added effect. I also like the Proteus for the Audiostobe effect pure entertainment.
I've been using a L&S device since 1992 and upgraded to the Proteus this year (got bored of the 10 settings on the old devise as well as only having red glasses).
Research is the best way to find the right device for you, however if you consider them silly don't bother with it,
Alex