*** Update ***
Got the new Actiontec GT784WN DSL modem/router setup and working. Did some speedtest.net runs and it looks pretty good. Getting consistent 1.30Mbps download, 0.75Mbps upload with 55ms ping, which is about as fast as I'm going to see with the service/speed I pay for.
Modem seems to run barely warm, which is good. Will see if its performance stays consistent over long use periods, I'm betting it will.