I also used the Kaplan subject tests, Princeton Review MCAT Hyperlearning books, Kaplan DAT Review book, and Cliffs Quick Review (for bio and chem)
I have DAT Destroyer as well but never got around to using it because I was strapped for time. Really, I should've studied more but since I was working full time I could only read through the review books (Kaplan + Princeton Review) and a few of the Kaplan subject tests. I took a few Achiever and TopScore tests for practice but my scores were pretty terrible on those. Actually my practice test scores were all pretty horrible...very discouraging. So I was rather surprised to see my real DAT scores.