I have an Intel server board (EATX) and am converting most of my equipment to rackmount at home (two server boards, looking at HDD rack system as well + custom cooling 4u or so, so about 16U worth) and while one of the setups has a specific case available (nonstandard format) the Intel setup can use a bog-standard EATX case and ATX-compliant PSU (currently hunting a redundant ATX-style but probably gonna just have to go with a big ATX unit.)
Cheap is good, needs 3 external 5.25 and that's about it.
I'm building a rack case (buy a set of rails and custom wooden enclosure) so that I don't need, but a recommendation for good rack cases (will buy either two or one and a full length drawer kit) would be very helpful...