Teac FD-55Bxxx's are okay; Toshiba drives are very much ignored--I've
got a couple of ND-01014's that I use for "tough cases" that will
often work when nothing else does. There have been some YE Data (YD-
580B) and NEC (1053) drives that I've used with decent results.
Fred mentions the Tandon TM-100's; they're not bad, but they are belt-
drive. I tweak one of the low-pass filter caps on the drive
electronics to give a bit more gain on these.
Micropolis 1016-2 likewise are belt drive, but with a leadscrew
positioner--they're slow, but indestructible, if the drive belt
holds.
Note that if you use belt-drive units, the tachometer circuit tends
to be pretty simple, so you'll need to keep tabs on the spindle speed
at regular intervals.
Drives I don't like: Qume 142 and 542; CDC 9428; Shugart SA-450.
Note that many older drives will require more power, if that's an
issue for you.
I've used others; but they didn't make enough of an impression to
stick around. If you're going to use hard-sector diskettes from time
to time, make sure that your drive will work with them. Some later-
model (for 360K, that is) drives will wait until a "drive ready"
condition exists (i.e., the spindle is at speed) before gating the
read signal to the host.
Cheers,
Chuck