Best Buy offers the Arris SURFboard DOCSIS 3.0 High-Speed Cable Modem for $44.99 shipped. That's $25 off the regular sale price/ Amazon's current listing and the lowest we've seen for it in new condition (We had one refurbished for $40 three weeks ago).
Renting a modem from your cable provider can cost around $13 a month, but if you buy your modem it eliminates this charge and pays for itself over time. Features include download speeds of up to 172 Mbps, 4 download & 4 upload channels, and 6 status-reporting LEDs for easy trouble shooting. Rated 4.5/5 stars from over 10,000 Amazon shoppers.
Note: We recommend asking your cable company if they support DOCSIS cable modems before you purchase. "DOCSIS (Data over Cable Service Interface Specification) is the industry standard for cable-based Internet access service."