Amazon offers the Netgear DOCSIS 3.0 Cable Modem for $39.99. Clip the $5 off coupon on the product page to cut it to $34.99. With free shipping, that's $5 under our June mention and the lowest price we've seen. (It's the best deal now by $21.) It features data transfer speeds of up to 340Mb/s and is certified for Comcast Xfinity, Time Warner Cable, Cox, and Charter, among others.