I would agree that the regular Prizm isn't too bad and is adequate for a smaller tank. I have one, and other than losing it's prime once in a while, it does OK. One of my maintenance customers, against my advice, bought a Prizm Pro for her 75g tank. It has been a constant battle to keep it working. This is why I don't recommend the Pro...we've just had too much trouble with this one. The Remora is pretty much a plug and play unit. Once you get the height on the collection cup set, it will sit there and run with no problems. There are no air or flow adjustments to test your sanity and maintenance is much easier to perform on the Remoras.
Life is not measured by the number of breaths we take, but by the moments that take our breath away.