I have a VM Shub setup in modem mode connected to one of these.
http://www.apple.com/uk/timecapsule/wireless.html
Its a bit on the expensive side but it makes auto backups and has good wifi range. Being Apple its fit and forget, it just works. You can also get a Airport Express to extend your network and plug external speakers or a USB devise.
From the apple web site: Some Wi-Fi devices use the 2.4GHz wireless band, including iPhone, iPod touch and devices using 802.11b/g. Others can use either 2.4GHz or the higher-speed 5GHz band, such as the latest 802.11n-based Mac computers, iPad and Apple TV. Instead of choosing one of the bands, Time Capsule operates simultaneously on both bands, and your multi-band devices automatically use the best available band.