What cable hookup should I use for DAT to hard drive conversion

Hi,

I have a Fostex D5 Dat machine with xlr & optical digital outputs and analog I/O right/left channels. I want to get these DAT tapes into my iMac (I have Logic 7 and will simply be using it to copy these to an external drive and then later master them. My goal is to get the music off the DAT tapes and onto the drive).

I also have an M-Audio Firewire Solo with s/pdif O/I and balanced RCA line outputs and unbalanced RCA line inputs. I will use this to interface with the iMac using the firewire connection to get the audio onto the disc.

My question relates to what is the best hookup I can use with this equipment and these I/Os for the best sound/signal? I've transferred a few songs using this setup: XLR cable from DAT analog output to the unbalanced line inputs on the Firewire solo then Firewire Solo to iMac through the fire wire.

Is there an XLR to S/PDIF cable I can run from the digital XLR on the DAT into the S/PDF input on the Firewire Solo? If I go out from the digital XLR on the DAT to the Firewire Solo I will be putting the R & L channels into one track (Firewire Solo inputs are #1 & #2 which give you the stereo R & L tracks.

I want to be sure to get the best quality transfer I have but I'm not sure how to do it.

Thanks,
Bob