I've had extremely good luck with my D-link DIR-655 router. It's never acted strangely. Still, it's starting to show its age. It's an 'N' router, but it's only operates on the 2.4Ghz frequency. But that's fine with me.

If you want the fastest router out there currenly, you'll want the Asus RT-N66U. From what I hear and read a very good router, but I have no personal experience with it. It would probably be my current choice though. There's already an 'ac' version of it as well (wireless gigabit!), but the problem here is that there are currently *very* few wireless devices that actually support the ac standard (yet).