You can't compare an Eclipse to a P180 without looking at what each is designed to do. The Eclipse is supplied without fans for a start. If you put quiet things in it, it will be quiet. A Raptor will be loud, no matter what you do. A Samsung HDD is usually very quiet and generates low levels of vibration. If you have a low vibration drive, rubber grommets are unnecessary.
I've had Eclipses for a long time now, and I am one of their strongest advocates - good build quality, sensible features and acres of room make them good boxes to put computers in. On the other hand, I think Antec (and to a lesser extent Silverstone) have damaged their premium manufacturer image of late with some products that are over-designed, specced out with 'features' that are of little real benefit and are of pretty flimsy construction. Compare a P180 with a Sonata. The Sonata feels like a quality item, the supplied PSU is a quality item, shaming many supposedly more powerful PSUs and the concept and execution are first class. It does make for a solid, quiet PC at a decent price. That case that has been forgotten of late as people (usually on the QuietPC website) build up excitement about the newest silent case from Antec, usually just before the bubble bursts with a general air of "well at least Antec's customer support is first rate" as doors, PSUs, drive cages or whatever have to be replaced one or more times under warranty.
So, no, an Akasa Eclipse is not loud.