Cisco has a very good range. You can choose with your own requirements.

try netgear
 

I've been using a wireless G netgear router for my home for the past 5 years. its got excellent range and quite a few filtering options and an inbuilt firewall. never had a problem till date.

I would suggest instead of using something like a Cisco Linksys or D-Link router, get a routerboard, which uses Mikrotik RouterOS. It's a great router, and you can pick one up for under $100.00 with built-in 802.11n.