Not surprised by the results. While I've always used ATX boards, I'm thinking of going MicroATX or even mITX for my next system.
ATX cases don't have to be all that large. Check the Coolermaster Elite 360/361.
yesCurrent desktop is a Dell Dimension 8200 P4 at 1.8Ghz ... so it is a tower with an ATX size motherboard ... When it eventually gets replaced, it will also be a tower type unit.