I really liked "Founding Brothers" and have been wanting to read "1776" but have not found the time to do so yet.
I can imagine John Adams is rolling in his grave with what is going on in MA and what they can "find" in the MA Constitution... and the US Constitution.
"1776" is a great book and a fairly quick read. What I think separates McCullough from most modern historians is that he still has an appreciation for the heroic. He views our great leaders as just that. No deconstruction, just the facts of how ordinary people could rise to the occasion and become extraordinary.