Which bands have produced the best first two albums?

Taking off from Mikes thread, what bands do you think produced the best first two albums?  So many seem to stumble after a great original effort (though most get back on track starting with their third album).
 
I'm sure I'll add to the list once I have to really think about it, but I'll start off with Boston where the second album was even better than a stellar first!
 
(Ok everyone, let's all watch Jan's post count go up!  LOL! )