Thales, or the member formerly known as righty and lefty......
I have used a few brands....
Aquamedic - small and a bit loud. a pain to clean the screen.
a teclima coil drop in. didn't last long.
a custom sea life now (current USA). prolly one of the best around.
now i have a coralife aquachill. it is a 1/4hp on a 180g. I wish i bought the 1/2hp. it runs quiet. not silent. it is the quietest i have owned. If i had to do it all over again i would take the great lengths to get a 1 h/p unit and plumb it outside. or do what garry thomas does. have a sump system that is 8x the tank volume and never have to worry about heating all that water!!!!
ben, I do have a massive under the house sump, its just that for like 3 weeks a year (not in a roe) the temp everywhere in the neighborhood get like 95-100 and the tank starts to climb. I am looking at a in room ac unit instead. We'll see.