40% Silver Kennedy Half Dollar Grading

Hello all. So, I have 4 OBW rolls of 1967 Kennedy half dollars, so I have 80 halves total. I was the first one to open them. I looked through them all and picked out (what I thought) were the best looking ones to be graded. I sent out four to PCGS, one came back MS63, two came back MS64, and one came back MS65. MS63 & 64 are not worth it to get graded (to me), since they sell for about $10, while the cost of grading is $16 per coin, plus other fees.


SO my question is, for the remaining coins that I have - before I send anymore out to be graded - what should I be looking for? What high points should be there? While comparing the 65 to the 64; I noticed just one difference and that was the neck feathers on the reverse, the 65 was struck a little better, but other than that I didnt see any other differences. Any other features I should check for? Thank you!