I'm sure you've already decided on one or the other and already home figuring out how you're going to fill it up, but for other's looking for advice...
My advice on a cooler is always get a widest one front to back you can find. That way if you want to put trays for singles in it, you can stack the trays sideways on one end and still have a lot of room for boxes. The cedar trays are 12.5 inches wide and most coolers aren't that wide front to back. The marine coolers are usually wider and have the latches to help seal them.
Just my :2