My first saltwater tank I built with my roommate. He previously had a 10g nano which we upgraded to this 55g.
Since this was going to be placed in the living room, noise was a huge consideration for me. After much research I decided on attempting to build a beananimal overflow. The results turned out pretty good. It's absolutely silent and couldn't be happier with it. The overflow box was made out of a few pieces of glass siliconed together and then siliconed onto the tank.
For the return pump we first tried a Quiet One but unfortunately it was not as quiet as the name implied. The actual noise it produced was not that much but it vibrated alot. Putting some foam under it helped to dampen the vibrations a bit but that still left the vibrations in the hose causing noise. Next I tried an Eheim Compact+ 2000. This one was great and just has a very low hum but really only noticeable when you are close to it.
The stand was an old one I bought off craigslist. After buying it we decided we didn't like how it looked so I thought I'd try and renovate it.