Why does everybody speak badly of Coxy he is the most enthusiastic commentator since Murray, he knows what he's on about too (as does Brundle) because he was a racing driver.
Plus his voice is perfectly suited for high action sport. The days of Murray & Coxy doing the BTCC were epic, didn't get annoying even for a second, it was brilliant, the MotoGP commentary is great with him too, very much backing him for the BBC1 commentary job
Also Ben Edwards again is not annoying either, again he is so enthuiastic about his job and the sport he makes it a joy to listen/watch the BTCC for 6 hours on a Sunday.
Having a race driver as a commentator is great because they actually know what they are on about, Legard, Allen, Crofty all get on my nerves with their mistakes. Chandhok puts Crofty in the shade when he joins them for Free Practice, again mostly because - he knows what he's talking about.
Brundle & Cox would , in my mind, be the ultimate combo of commentators, only beaten by Clive James' commentaries on the 80's F1 Reviews :P