Wouldn't matter whether you are using any particular cable modem with the exception of a wireless gateway, which is what you had with your dsl service. Any stand alone router will work fine. BTW, you were flat out lucky to have a good wireless gateway with your last service! I had dsl with AT&T for over 10 years, and their wireless gateways (2-Wire) were notoriously sketchy at best. At any rate, although Comcast does off wireless gateways, I recommend you absolutely stay away from them...they are not at all effective solutions, short range, extremely limited user settings.
I do recommend a middle-grade model or better for a router, really, brand is not a big deal...they all make decent models once you hit their middle-and-up models. I would opt for a dual band router with gigabit ports and IPv6 compatibility as features.
One thing that you might consider is gewtting your own cable modem, as it will save you $7 per month, and there are some good choices at decent prices. Particularly the most recommended modem would be the Zoom 5341J (specifically the "J" model) Docsis 3.0 modem, which you should be able to nab for $79 retail. Do not go for an ebay or used modem! Many of these are stolen or non-returned equipment and Comcast won't provision them. This is one time to buy retail.
