Modern Speaker switch for use with banana plugs

Thanks for all the responses. I have some options and directons now. Mahalo. 

Luxman AS-55. One amplifier to three pairs of speakers. You can find 'em on eBay.

I bought this one with upgraded silver wire for my Home theatre system to use the same main speakers but switch them from a 2 channel tube amp and a home theatre 7.1 avs amp. Works and sounds great. You could use multiple ones to add more speakers.

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With multiple amps it sounds like you need two switches.  One to select amps and one to select speakers.

This one looks good.

I use a Solupeak P2 with 100 watt amps.

I would see what they're using at the stereo stores to demo their products.  They use those multiple input/ output switches, but the banana plug thing might be an issue.