best way to connect 2 digital dev to a 003 ?

[la duc]

Hi,

I have a 003 and a kurzweil rumour connected with spdif. Today i am getting the ISA one digital. I heard that the wordclock and converters are a bit better then the 003 has.

So how do i hook things up ?

I was planning on locking the 003 to the isa using the lightcable. However how do i lock the kurzweil to the isa ? or can i just connect it to the 003 and lock it on the spdiff..?? I mean the master is the isa, so the 003 and the kurzweil should be slaves..

Anyone have the best sollution here with the best possible quality ?
ps , i am not worried about recording at 48khz max...