I like the Future Domain cards, especially for older machines. Future
Domain had a chipset called 950 that was used on their 84x and 85x
series cards. There is great software support in DOS, but it is not
ASPI compatible. In their defense they do provide a device driver that
converts their CAM drivers (Common Access Method) to ASPI, but that
slows things down.
I've been able to hack a TMC 845 onto a PCjr using an ISA bus adapter
for the Jr. PC Enterprises also sold a SCSI sidecar for the Jr based on
the Future Domain chipset.
And as other people mentioned, Future Domain did a lot of OEM work for
IBM, including MCA cards.
Mike