A dual-band router is your best bet if you'll be connecting gaming consoles, media servers, or smart HDTVs.
They operate on the widely used 2.4GHz band and the less crowded 5GHz band, which offers better throughput and less interference.
With a dual-band router you can have your smartphones and laptops connect on the 2.4GHz band, and save the 5GHz band for content that requires stronger bandwith, like streaming HD video and playing video games.
For maximum coverage in a high traffic home network, consider a tri-band router which gives you one 2.4GHz radio band and two 5GHz bands to share among your devices.
Expect to pay upward of 0 for a multi-band router.
If You Can Afford It, Futureproof With Advanced Features When shopping for a router you'll have to decide if you want an 802.11n model or an 802.11ac model.