I dont know where else to ask this since it's not completely home theater related... but it's close.

In my kitchen (and bathroom and bedrooms) I want to be able to have a HTPC hidden away somewhere. I want this to show on a small LCD (either computer monitor or tv) in the room... controlled via a remote (will probably be XBMC or something similiar). I want the audio from this to go through some in wall speakers in the room controlled by an inwall volume controller.

That part shouldn't be too hard. However (and here's the part i don't understand) i want to have a jack in the wall (rca probably) so that I can plug in a laptop or mp3 player (or anything really) and be able to switch the input to that so it will play over the in wall speakers. How can i do this?

In doing some more searching I came across this:

Impact Acoustics Four-Input Amplified Volume Control with IR (http://store.audioholics.com/product/1227/0/impact-acoustics-four-input-amplified-volume-control-with-ir)

Which is pretty much exactly what I want... however it looks like it's tied to their 4/8 channel distribution systems (http://www.cablestogo.com/product.asp?cat_id=2224&sku=37025&relatedItem=true)... Besides having this feature it seems that this setup is very very entry level and might leave me desiring a lot more.

The only issues with this solutions seems that it would allow the kitchen to select the bathroom as a source... which isn't really ideal.... and if I have to have each room selectable by any other room it has to be at least 5 sources. (3 bedrooms / bathroom / kitchen). I do really like the idea that this solution seems to have a built in IR repeater and volume knob. I'm not too stoked on the fact that it seems to provide the power though... 10w per channel seems weak.