I like the the Antec 902 but my understanding is that it is very noisy? Is this not true? Can you make the Antec 902 quiet?
Open leaky cases are acoustically lousy and loud. Anyone who says otherwise should put his money to where his mouth is and live in appartment house without walls between neighbours.
After old style 8cm fanned Chieftec I got open fronted Stacker thinking that low speed fans would do it but was badly disappointed.
Every single noise comes out at full strength and 1000rpm Nexus fans were sounding rather nasty all the way to CPU fan in other end of case... along with HDDs in their modules.
Now in combination mat lined closed design A71 CPU heatsink has Scythe SlipStream running at ~1140 and that fan moves nearly 30% more air per RPM with associated higher airflow noise. Also HDD seeks are pretty much impossible to hear except from really close thanks to soft mounting and noise containing case.
As for closed design being bad for cooling... Got inspired in weekend and Q9550 has now been crunching Linpack for eight hours at 3.7GHz and highest core temp is 64C with Noctua NH-U12P. (case fans slightly or more below 900rpm)
I think I could consider it as stable result and give it lighter Prime to run for the night...
Sure open leaky case can be quiet but that's only if components don't produce noise to start with and fans are running at lot lower speed for compensating lack of any noise attenuation. For starters HDDs would definitely have to be suspended using elastic material like rubber bands for keeping them quiet enough to be comparable.
Just plain opening of door in A71 would probably notable lowering of speed of fans and HDDs would probably have to suspended.
Antec 1200, like any plain ATX case, is cramped for long cards/lacks working space:
ATX vs.
E-ATX
So if butt ugly magpie's nest is wanted then actually even cheaper HAF is better than holy cow -Antec.
...Armorsuit or Thermaltake Armor ...
If you really need quiet you could try and pick up some Dedshete or Acoustic dampening foam from Wilmslow Audio.
Foams are epic fail for lowering noise in open cases unless you'll thoroughly and thickly block holes used for airflow.
Had combination mat lining in that acoustically p.o.s Stacker...