I had Jopko for 1D03 and Okon for 1E03. Mind you apparently Jopko doesn't teach anymore
OKON is the best hands down. In class he worked examples, and those same examples were on the exam word for word. so make sure you go to every class. Took this class semester 2, 2008/2009 year. And also I used the sixth edition and it was perfectly fine. For my year they posted suggested problems from both sixth and seventh edition. I am not sure if they still do this.