Cisco DPC3010 DOCSIS 3.0 Cable Modem COX firmware upgrade.

Cox Support:

Months ago some AWESOME tech support rep upgraded my modem firmware when I requested it on this forum.  I'd like to make that request again now.  I just updated my service from Premier to Ultimate and I'd like to make sure I have the most updated hardware to take advantage of the increased speed.  Please push a firmware update to my modem if one is available.  Thanks very much for your help!

Update: My current router is a Linksys WRT54G so I think that's part of my problem.  I want to upgrade to this one, what do you think:

ASUS RT-N66U Dual-Band Wireless-N900 Gigabit Router

If this cannot support 150mbps or if there is a better alternative can you recommend please.

Thanks!