> Attic > Pros: Less noise, easier cable runs. > Cons: can get hot depending on where you live, roof leaks, humidity/condensation, and creepy at night. Where do attics not get hot? I live in northern climate, and ours regularly gets hotter than 140F during sunny summer days. And I say hotter, because the remote temp sensor I have up there maxes out at 140F. I wouldn't be surprised if it actually gets up to 150F or mo…
It's nice because that loose, shredded insulation is garbage and so easy to mess up (walking on it can change it from R40 to R20, for example). With a conditioned attic you use standard batting in between the roof members -- impossible to mess up.