I need to digitally transfer several analog and digital
recordings to and from a laptop. I'm looking for a box
(something akin to an external sound card) that has as many of
these features as possible:

SPDIF in
SPDIF out
usb or firewire in
usb or firewire out
analog audio in

I need to be able to go from DAT to the PC, or from a tape deck
to the PC, and from the PC to DAT. If it's possible to get
something with more than 2 analog inputs, that would be a big
plus; I'd consider an interface with 8 channels in (and ADAT out,
for going to another recorder) if I could also use it to get to
and from the DAT deck via SPDIF. Rack mount isn't necessary, but
would be cool. Wall wart power is a BIG negative. I use Adobe
Audition on the laptop, but I assume that any box I buy will come
with the appropriate software/drivers. I'm running Win XP, if
that makes any difference.

Anybody have something they'd recommend? Or perhaps somebody has
something they'd recommend avoiding? Thanks in advance.

Fred