I picked Berkhof, Grudem, and Calvin. I haven't actually finished any of them cover-to-cover, but have read large portions of each of them. The Grudem book I have is called "Systematic Theology" and not "Bible Doctrine" though. As Dave said, Grudem is easy to read, but I have a number of disagreements with him. Also, one book that is not necessarily a full systematic theology text, but has had a rather large impact on how I read systematic theology books is C.V. Til's "An Introduction to Systematic Theology".

John