At present, extended ATX cases are very limited and cost a pretty premium. Only a handful are available with the cheapest coming in around the $100 mark and it doesn't have near the storage or expansion capabilities. Anything offering the same features or close to that of the Whisper are going to run you $170 and more. That's something definitely worth considering if you're in the market for a quiet, spacious super case like the NZXT Whisper.