I have already gone through the standard AP Calculus BC curriculum with Stewart and was not fond of the book. I'm looking for an Calculus/Intro to Real Analysis book so I can get a better understanding of the subject. Apostol,Spivak and Courant stand out as the best books for this. Can anyone who has experience with one or more of these books give a recommendation. If you know of any other books that would be appropriate I'm still open to other choices.