The older linksys wireless routers I used were ok (went months without problems, buthad to choose channels carefully) but my current favourite is my airport extreme gigabit; 802.11N run on 5GHz and never had a single problem, never had to reboot it, never had interference and over 10Mb/sec throughput with ssh... but then I only use wireless for laptops.

Pretty much all other consumer grade gear I've used has sucked.