I find Brian Smith to be very informative and good to listen to, always has some interesting stories form his pro days.
Anthony Mccrossan used to be terrible, he barely knew what was going on if you watch some older races but now recognises the riders far more accurately than Liggett, who never gets the names right for someone held in such high regard.
I like it when they answer emails and rib each other over the days predictions as well. Although Mccrossan does try and plug the premium channel a bit too much when the race actually hots up.