I was also going to recommend Niles, but there are some things to consider about those. First, they are kinda pricey (at least, IMO). Second, the one that caught my eye (the SS-4) requires a receiver that is compatible with a 4-Ohm load.
There is also a Monster (yeah, I said it) unit that is the #1 seller on Amazon for speaker selectors. It costs about $55.
If you'd like some opinions on any other ways to work it, just let us know which receiver and which speakers you're using, and we might be able to come up with another solution.
