Top 20 Bands Improved by New Drummers

Here's a toughy...how bout Barriemore Barlow replacing Clive Bunker in Jethro Tull?
That's a difficult call. Bonham thought Barlow was the greatest drummer out there and that's pretty high praise. But Bunker played on everything up to Aqualung. It's a good debate.

Clive is a drummer that I think plays at a level of performance that I could get to.