Welcome to the forum KrispyNote,
In regards to having your notes graded, you'll find a lot of mixed views on the subject, with one of the main concerns being "over graded" notes, which has left a bad taste for a lot of collectors.
Once a high grade note has been encapsulated you can't grade it yourself, which makes a big difference between different "uncirculated" grades.
It's often not as much of a problem with lower graded notes, but their are buyers who stray away from anygraded notes, Just beacuse of a lack of trust in the grading company's.