On the Morgans I would consider if you intended to sell right after slabbing, or is it for the protection of the slab as well as the knowledge of grade. If for selling, then PCGS will give you the higher return and easier sale. On the downside, costs more and takes longer. If for the second reason, consider ICG. I have sent 3 batches of Morgans/Peace to them and have been fair with the grading. There is one that came back cleaned, which I disagree, and one that was labeled "scratched" which I could barely see with a 10X. Other than that they were very close +/- with my PCGS and NGC graded.( in my opinion of course)
They have a current special for Dollars under $500 in value, for $12/2 day service. It is an extra $5 for a
VAM and takes about a week longer. The registered mail/insurance fees are about the same for both, so that is a wash. If you have a lot to submit, ask to be a dealer and get a better deal on fees and shipping. If not, apply for their "collector's club" which basically is free if used.
Jim