+1 For the airport extreme,
I have owned Netgear and Belkin routers in the past and all were problematic, with the Airport it's very easy to setup and maintain (Hell, if you need to reset it for any reason, you can do it from your mac!)
In my house we have a LOT of bandwidth downloads (7 Students in a HUGE house, we don't have a TV so we all stream/download TV, in addition to all our Uni work we've gotten through almost 30gb's in one day! 😱) and it never gives us a problem (In fact the airport extreme is significantly faster on throughput than the old Belkin (both are N standard)