Also would be interested (if you can procure them) information on how well motherboards support coreboot, like what hardware parts it can't init on any given board. I'd be buying mobos with coreboot support (because efi is a trainwreck) if I could, but comprehensive evaluation of boards (even on chipsets that should support it) are few and far between. IE, I have an old AM2 board that works with coreboot but it has an asmedia usb hub that never gets started, so that board has 4 dead usb ports.
A question though, what is so bad with EFI? Calling it a train wreck seems to be going overboard.