I'm not really excited about the British tanks (now...been playing the common test server), although fully upgraded Churchills will probably dominate around tier 5-6, until the next tank tree is released. The high tier, high accuracy British tanks plus cheap premium shells will probably bring back the 'invisible tank' syndrome. I am a little curious what a platoon of tier 5 Crusaders would do in a tier 4-6 battle.
I do want a Firefly, when/if that premium comes out. The Black Prince doesn't interest me.