I have 4 Polk MOMOs, there are a few different types, mine are the 3ways with the crossover. I wanted full range on mine, and they deliver.
Mine were about 190 a pair, good stuff.
The other thing that I like about the Polk stuff is that although it is not "marine" it is marine certified. They specifically say that it is good to go in marine applications.
I dig mine, and they are very cool looking too!