[citation][nom]anxiousinfusion[/nom]My ideal case would be; full dust filter integration, no 5.25" bays, 2x USB 3.0 front panel, power but no reset switch, and the front would be entirely ventilated with fans.So far nobody has made such a case[/citation]
The 5.25" is a near necessity, either for the majority who still use a disc drive for something, or those who have devices to stick in there (fan controller, SD memory card readers, water cooling reservoir/pump). I don't know about the reset button. Personally I don't know many who use it for much. Most people seem to just shut the system off and turn back on if they have to. And, you didn't mention the front panel audio or eSata...
I do think you're on to something, though. It would be nice to have a case with some sort of well done modular front panel, so you can take out the stuff you do't want and keep the stuff you do.