I'll be selling my pair of 6025s if the 6045s don't kick up a sandstorm in my tank. If they do, I'll sell the 45s. I spoke with Premium and I'm getting the 6045s next week; I've been on the wait list since August. Since these things are in real demand, I'm pretty sure I won't have any problem selling them. The 25s are producing really good flow in my corner tank; it's just that my tank is right in between the recommended size for each pump. If the 45s do work out it will be 2600gph in a 50 gallon tank with no noise and 60 watts.