Suggestions for lightning protection for Cable Modem?

[Tuthmose]

Hey all,

I've got my home network up and running nicely (thanks to some very helpful guidance from here, btw), but I've run into another question. I have ComCast business internet (12Mbps basic plan), and I'm wondering about the best way to provide solid surge protection on the incoming cable.

Previously, I had DSL, so plugging the incoming phone line into a decent surge protector worked well. But I am at a loss as to how to do this with the RG6 coax. Unlike with a DSL phone-line signal, I'm worried about using a surge protector setup like that for fear of degrading the incoming signal which I understand is a lot twitchier with cable than with DSL. So . . . what equipment do pros/data centers/etc. use to protect such systems on cable?

Any advice would be greatly appreciated. At the moment I'm physically unplugging the cable during storms, but there will come a time what I'm not home for one . . .

EDIT: Just for information, my Comcast gateway is showing downstream SNR at 37.63 db or thereabouts.

Thanks,
-Tuthmose