I'm torn. I started with the Equinox 600, when it was introduced. Loved it. Was sent the Vanquish 540 Pro to test and review, and never picked up the Equinox again. I am waiting to receive the new machine from Nokta/Makro, which will be fully submersible, which of course the Vanquish is not. If you want to get in the water past your ankles, get the Equinox.