My biggest gripe with the neros is the long cord attached to the motor which makes them a pain to remove to clean. Rather than fish the cord out from inside the stand I resorted to cleaning them next to the tank with a bucket on a chair. MP40s I keep a spare wet side and just swap them out.
I have a 36x22x22" acro dominant tank with two MP40s on the back wall running on reefcrest at 60% with 3 nutrient transport mode periods at 65 % . I also have an MP10 on the left end down low toward the front that blows across the front and all my detritus collects in the rear corners for easy vacuuming. That said my rock scape is quite a bit different than yours and I'm bare bottom. I have multiple tanks running with a total of 6 MP40s and 2 MP10s some that have been running for upwards of 8 years. I've been very happy as long as I don't drop a dry side. They do not like hitting the floor but thats on me. Not having to run to cables over the top of the tank is a bonus.
I'm not really a fan of ecotech and will no longer run their radions because I got tired of lights coming on in the middle of the night when Mobius decides to loose track of the correct time but I love my vortechs.
The tank I mentioned above.
EDIT: I have ran a few gyres (icecap and jebao) and the icecap always got noisy. I don't know how but they would get a bubble inside and start whining. The jebao while they stayed quiet I just found them a hassle to clean.