The hook for On3 for me was $1 for a subscription. They tout their message board as the best, but it's nothing compared to IE (knowledge, maturity dedication, etc). They are very try hard and put out a lot of content, which for some might make up in quantity what 247 has in quality. My gut feeling is that the 247 staff is the most plugged in. Hansen at Rivals seems plugged in as well.
I can't say anything bad about ISD because when I was overseas it was the only ND podcast around and kept me in the loop when I had limited access to things. Maybe Mike Frank didn't change with the times. It happens.