So, my old Tunze Gyre broke, and my tank is currently running on my emergency powerheads, which are Aqua Medic pumps that are AI Nero knock-offs. However, they aren't a permanent solution to my problem. Therefore, I'm in the market for new pumps, and I'm quite torn between getting an Ecotech MP40 or an AI Orbit 4. My main concern is that I want a pump that is silent, as I sleep in the same room as my tank. Additionally, I want it to be very effective at surface agitation; my tank dimensions are 150x50x50 cm. Lastly, I'm looking for a pump with a long lifespan.