I did this and I would say that if you have the option of taking it for a letter grade then do so but make sure that you get that A. When i went through the application process I had adcom members tell me that the A was more beneficial than pass/fail. Think about it in terms of them comparing you to others with similar backgrounds or situations. That's how I looked at the app process. How can I position myself BEST when being compared to other applicants? An A in those classes would appear "better" than pass/fail. With that being said, it does say something about an applicant who decides to take supplemental classes.

Thanks guys. Went with the letter grade. Now, gotta make sure I get that "A"...