I'd have to agree with the parent - most of what your talking about is nonsense.
I had an emplant board too - all it did is provide Mac serial (for appletalk) and a place to put roms, but I've never seen anyone use the sockets for that (admittedly we just downloaded them - and the software had full support for just using soft roms). It also had a slow speed scsi interface that no-one used.
Otherwise it was a stupid waste of money - shapeshifter was just as fast.
I really honestly can't think of any Zorro cards I wish I had still. The Rentina was buggy, the Fastlane was buggy and the VLAB was buggy. The DPS PAR was awesome, but you don't need one of those anymore. The Toaster/Flyer was awesome too - but likewise - you don't need one of those anymore - and getting it to work with a more modern workflow is a lot of work.
Oh we also tried out the Centaur Opalvision - because we hoped to use the never released roaster chip (to replace the video toaster). It was hacky, but colorful