I think if I was buying a Quiet case today for a new build...
I might go for the Antec P183
Antec made the case a little bigger than my old P182 making install / changes much easier + has just enough extra room for a card like my 5850 which was a Real squeeze in my P182 with 2 x drives in the opposing removable HDD caddy thing
used to have 7 x HDDs in my case lol
These cases can also remove an extra drive cage to be able to install a monster card and still have 4 dedicated HDD fan cooled slots left over
The P183 has several extra features than the P280 :
- an extra aluminium layer in the side panels
- a seperated bottom chamber housing PSU and rack for 4 x HDD (fan cooled)
- comes with 1 more TriCool antec 120mm fan I think
The TriCool fans have a Slow / Med / High settings
Only the cool setting is quiet and they cannot be connected to a fan controller
One thing about the P280 = the PSU air intake is on the bottom of the case, so if like me your PC sits on carpet... its air intake (with filter) will be heavily restricted
The PSU can draw a limited amount of air from its bottom from inside the case also, so will not get completely blocked by carpet.
Personally is all a matter of taste, for me the P183 seems to have been built to a much higher standard than the P280
But... the P280 has 2 x top 120mm fans aligned to be compatible with water cooling radiators which is a possible bonus
Have not been following other brands quiet cases in recent times so much to comment on them.