I don't find mine that noisy but I do keep the kitchen door shut if it's on and we're going to bed.

hmmm im thinking on buying one, but not sure yet. Theres a 9 tray set and 5 tray set, which one is worth the money.

I have a 9 tray and its tight, but I most of the time a 5er would be fine.

Unless you're planning on doing a LOT of dehydrating, just get a 5 tray.
I only have a baby 4 tray one and it's fine for me. :-)

Have you checked into Cabella's dehydrators... they have a door to them... but I'm not sure if that makes them less noisy (never heard one running).

I never heard of that dehydrater , i searched it up. they look pretty good, not sure if they run better than the excalibur.