Disk and controller suggestions for 3/160

[Ender Ayanoglu]

The SMD disks and their controller for the 3/160 at a site have died. The
disks have large capacity (500 Mb, I think), and the owners are
considering the option of going to even higher capacities. They asked me
to post on their behalf: what are the popular, reliable SMD disks these
days, and what kind of a controller they should buy to go with these?  In
particular, is IPI the best choice?

Thanks in advance.
Ender Ayanoglu
ender at boole.att.com