Personally, having speaker cables longer than 10' is a no-no situation in my book. Having said that, I do run 25' - 30' cables from receiver to surround speakers in my HT setup. For the music only system, I keep cables, not only speaker wires but interconnects as well, as short as possible.
I don't see how your going with computer audio would make your speaker cables that long, especially when "the audio/speakers on one end and the computer station on the other". The beauty of wireless squeezebox is that you can access ripped music stored in your HD which connects to your computer from the audio end while the computer is located elsewhere. Plus, the battery modded TEAC amp will give additional flexibilty when it isn't in recharged mode.
Oh well, I may well be missing something...