Antec makes/mods some of the best cases out there.
So does Evercase.
So does Enermax.
So does Silverstone.
So does Coolermaster.
...and so on. I know I missed a couple.
However, a lot of people aren't going to think about noise, or how easy it will be to work with, or that you might get a decent PSU in the deal, a nice design for air flow, or any of that.
Then in a year or two they'll curse themselves for it, get a nice case, and mod the lights and crap into it for the bling, rather than buying it already there .
The Antec SLK3700-BQE and Sonata-II are probably the best values for case/PSU combos--but I'd bet a sub-1mm thick Raidmax or Aspire will sell better, until the noise becomes unbearable, or the owners get a few cuts when upgrading parts.