Timely thread bump. I was just thinking about buying a new router. I'm too busy to run Ethernet so my cable modem (100mbps service) is all the way on one side of the house where my PC is. The WRT54G only gives us 1-2 bars on the other side of the house.
I have an iPad Air 2 (I think) and my wife has an iPhone 6+ so we'd be able to take advantage of ac. It sounds like a Nighthawk is overkill though. At most I'm streaming 720p video over YouTube.