i recommend Apple's AirPort Extreme. The range lasts through my entire house, and even across the street. You cannot beat the signal of the AirPort in such a small package. I had an old D-Link that was a piece of crap. Of course, i only buy apple anyways but whatever.
if you only buy apple..
the only advantage when you get the APPLE Airport Extreme, is you can hook it up with your speakers/ home theater and listen to your itunes wirelessly.. and it's handy, so if you travel a lot, this one is a better choice.