So - I was headed down this path this weekend and it ended poorly.
I went to Costco and bought their Cable Modem option that said it was compatible with Comcast. Who Hoo!
When I called to have them turn it on for me, they sent me to a loyalty person to discuss...odd.. Well I'm in a triple play (tv / net/ phone) - and the modem I bought didn't have a phone jack on the back. So - if I wanted to use this modem I had to change to a double play package, which would increase my bill by $20 instead of decreasing by $10. Epic fail.
The modem from Costco was $90. I looked up compatible modems with the phone option on the back, and they all cost $229 or higher. To me, that didn't seem like a good option. it would be almost 2 years before I break even.
Thoughts?