QUOTE(ckboon @ Jan 14 2012, 01:46 AM)
it doesn't matter if they are using 1,6,11... just choose 1 of those that have less congestion. if you chose channel 4 it will interfere from channel 1 to 6, hence getting more noise.... anyway if u r happy if the link, then just use it.

Sorry to burst your bubble, but you are wrong
ALL channels overlap, 1 overlaps with 2, 2 with 3, ........ 10 with 11.
So in theory you are correct, if we are in a condo, and only three wireless AP there, then the best way is for each to use one of these, meaning one of the routers chooses channel 1, the other channel 6 and the last is channel 11. This way they will not overlap at all. But what if there are MANY others on channel 1 or 6 or 11? You will interfere.
So basically what you need to aim for is to stay as far away as you can from congested channels. If that means going for 4 or 7, go for it.
See this pic from a router "wireless survey", it scans wireless networks nearby, see the
recommended channels
Btw, did you buy a NAS? how's torrenting