john barrett is the brit and josh eagle is the aussie.
barrett is probably the most well known commentator outside of the US. He has good knowledge but i have to admit he gets on my nerves at times as well but for not such trivial reasons. hevery match he talks about how bad racquet technology has made the game and every time someone takes an injury timeout he goes on the same rant about how they never used to exist and they didn't even use to sit down at change overs.
yesterday he went on about this analogy between the davydenko/volandri match and a davis cup tie where the romanians underperformed on clay because of home town pressure and said it was the same reason volandri was playing poorly - but he is italian and they are playing in germany
he is better than most though. i actually think josh eagle is really good because he's pretty quick witted and knows most players personally because he just retired.