My current NAS (old PC with a bunch of old drives) needs a upgrade. It is pretty old and consumes alot of power. I am looking for a stand alone NAS about 1 GB, raid would be nice, low power consumption, And must work in mixed computer environment. I have a airport extreme base station but hooking up a drive is unreliable and SLOW. I am looking at the Western Digital My Book World Edition II. But I have read it is slow. Any one have any thoughts? Also should I upgrade my switch to gigabit Ethernet if I get the Western Digital.