Sounds like you have the same issue as I do. Money.
While they are phenomenal and I would gladly part with the $450 if I had spare lying around, I just can't afford it.
Instead, I purchased a pair of Jebao WP-25s. Not as clean of an install (wires in the tank vs. no wires with the MP40), but still a powerful little wave maker. Jebao just released a new wavemaker that allows for sync between units like the Ecotech MP units offer. Best part is that you can get a pair for under $200. Keep in mind, Jebao offers a 10, 25, 40, and 60 model... They are significantly more powerful than the equivalently numbered MP pump. The Wp-25 is comparable to a MP40 in power. I have two in a 110 display and they move the water really, really well.