11n recommendation?

I've ordered a laptop with an 11n wifi card. I'd appreciate a
recommendation for a 4-port router with 11n capability. I've read about
MIMO, and if it increases the distance over 11n, and if I can get a MIMO 11n
router then even better. Cost isn't the main factor here, having a
firewall, being easy to use and reliable, and distance is.

Thanks for any help.

Chip