Apple Remote for iTunes, an Apple app, does work for the new ( 2010 ) MB Air.
I do like the MBA very much however, personally, I would buy a Logitech Squeezebox Touch, use the iPeng remote-control app, and put the computer in some other room.
If you still need an additional computer for music storage I would get a mac mini ( possibly used on ebay, I see some for around $385 right now ) and plug a firewire/usb external disk into it and store your music on the external disk ( for portability ).
This may not be the optimal solution for you however, it is what I would do.
I haven't done this because I think that SACD DSD recordings are just this year maturing and are nothing short of incredible.
I do like the MBA very much however, personally, I would buy a Logitech Squeezebox Touch, use the iPeng remote-control app, and put the computer in some other room.
If you still need an additional computer for music storage I would get a mac mini ( possibly used on ebay, I see some for around $385 right now ) and plug a firewire/usb external disk into it and store your music on the external disk ( for portability ).
This may not be the optimal solution for you however, it is what I would do.
I haven't done this because I think that SACD DSD recordings are just this year maturing and are nothing short of incredible.