Should I return the Mount Hood ATB coin that has a small ding on the rim above the ?S? ?

Just received my ATB Mount Hood 5 ounce coin today and not the best of the five I feel. I asked my daughter to open the US Mint shipping box which held the ATB coin. After that she opened the ATB US Mint box and when she looked at the Obverse side she notice right away that there was a slight nick on the rim. My dilemma is this, I was thinking of sending all five coins to get graded but I feel that the Mount Hood with the ding will get me a lower grade. A friend told me to order another one and when that one comes in send back the ding ATB coin. I am up in the air with this. I am tapped out and saving for the AE 25th Anniversary set. Should I take the chance that the next coin will not have dings or just go with the flow and send it in anyway? Your thoughts on this fellow Collectors.

Happy Collecting

Ed