Another consideration you should take into effect is speed. There's one major manufacturer of networking equipment that has some IEEE 802.11A equipment that can allow for transfer rates of up to 72 MBps. They also have some enhanced 802.11B equipment that will let you get up to 22 MBps. These are all half duplex speeds, BTW.
If you're going to be doing large file transfer, I'd stick with CAT5E. There's a multitude of cable management and hiding equipment that can make things a lot more organized looking. Hope this helps.

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