If you're concerned with noise, don't put a Carlson surge device on your reef - entertaining to watch, but pretty loud (might induce spontaneous bed wetting as well ; > ). Also, don't connect Rio pumps to X-10 controllers as a wavemaker: The Rio pumps almost always chatter on startup and the X-10 controllers make a significant 'CLACK!' when they turn on or off. (I'd like to acknowledge that Rio recommends against connecting thier pumps to wave timers).
Oh yeah, avoid mantis and pistol shrimp (hey, some people just think they're neat) - they're all set with thier own noisemakers for the party davelin mentioned.
Also, consider the type of overflow/surface skimming you're going to use... it could create a good bit of noise if not designed to minimize gurgling.