I use the SB6141 and the N900 also, and have gotten strong 150-160mbit speeds (currently at work so can't post results for speedtest).

Router: http://www.amazon.com/Netgear-WNDR4500-N900-Gigabit-Router/dp/B00HEX851C

Modem: http://www.amazon.com/ARRIS-SURFboard-SB6141-DOCSIS-Cable/dp/B00AJHDZSI

Anything from netgear I have the netgear n900 and this thing is a beast. FYI when I bought mine it came with a lifetime warentee, and for those who know when you router dies it sucks, netgear with send you a new one for free if it dies, although I doubt it will, have had mine god knows how long and not one problem. Also if you use a cat5 cable to connect to your router, that's a hardline connection not WiFi.