Nice pictures!! We installed the 24" ivory travertine coping as well. We bought ours from NPT and they turned out GREAT!! After reading several message boards i plan to skip sealing them as it seems to have little effect. However, I'm still thinking of how to fill in all the little holes. Some have more holes than others, but over time I'm afraid of dirt and algae/mold growing in there. I'll have to start another thread to see what the community on TFP thinks on that.
Something that i dealt with that you may need to push is an expansion joint. In SoCal and especially my neighborhood, the ground tends to shift a little with the hot/cold weather. My previous pool had cracks near the water line because of this. I pushed for an expansion joint, but the re modelers left that out when they installed the coping. So i had them cut 1/4" all around the pool and fill it with deck o seal. hopefully, if you need this you can have them do this up front and save a bit of a headache.