Second and third what is said above. I have a Lewmar 1000 profish. Made the mistake of getting 600 feet of 3 strand nylon (very stiff, hopefully will soften up with use). Also have 60' of chain. I can get all but about 100' of my rode in the anchor locker (keep ~100 feet in a small laundry basket in the v-berth) but I have to "adjust" it about every 100 feet so it packs in to fit in the locker. During adjustment, I noticed that the location where the rode comes into the locker is towards the front of the locker and the rode tends to stick/hang up there so definitely take into consideration the comment above about having the rode drop into the deepest part of the locker.
In southern California, we will anchor in 50-100 feet with a rocky bottom and I wouldn't want less than 60' of chain in these conditions. I have been told that one reason for longer chain is to get the rope part of the rode off the bottom where it can fray/cut rubbing against sharp rocks on the bottom. Those with more experience chime in.
For what its worth, to mark the depth on the rope, I used blue and yellow 1/4" hollow poly braid, with yellow = 100' and blue = 200' (100' = (1) yellow marker; 200' = (1) blue marker; 300' = (1) yellow and (1) blue marker; etc.). I made each marker ~6" long by using ~12" of the poly braid, making a small loop/eye, and inserting ~6" back in the hollow part of the braid. At 100' intervals I fed the appropriate marker(s) through one of the three strands of anchor rope, looped the tag end of the marker through the markers eye, cinched it down on the strand of anchor rope, and then ran the markers tag end over/under the adjacent strands of the anchor rope. I also wove a single length of green parachord at 50' intervals (150', 250', 350', etc.) into the strands of the anchor rope.