Stucco walls, wood walls/floors. I'm in a glorified condo, houses are attached at the garages. I've used the wifi analyzer app, but my current modem seems to be ignoring what channel I specify. It has no external antennas (Westell 7550). I had a Linksys WRT150N at one point but I can't seem to find the damn thing now.

I may end up moving the modem and buying a wifi adapter for the desktop. Dunno how detrimental that would be gaming over wifi? Of course if the signal drops remain an issue that isn't a fix... I gues what I'm wondering is if something like the N66U could "drown out" the neighbors signal?