Short Version:  Comcast offered me 150 mbit service at a price point I
couldn't turn down - but it's known to be more than my wndr3800 can handle.

Any recommendations for replacements?  Looking for decent support under
OpenWRT and at least 4 wired gigabit ports (6-8 would be nice, but not
mandatory) and 2.4/5Ghz bands.  Would be nice if it's around $100-ish, but
willing to go to $200 or so for more features (ports/antennas/RAM/flash/CPU).

Willing to test bleeding-edge stuff on it, as long as it has a hardware
"unbrick me" similar to the wndr3800. (For reference, the laptop I'm on at
the moment is running this morning's linux-next kernel and Fedora Rawhide, which
should tell you how non-risk-adverse I am :)