Anything to record as much as possible during a live jam...

I've found SPDIF, per se, to be fantastic for recording. I've had no issues with master/slave clocking. Use the Saffire's ADCs and pipe the bits into your computer. What's not to like about that? It's about as ideal as it gets. What am I missing here? Why all the bad vibe about SPDIF?
 
We've already established it's not usable in this particular case cuz SPDIF is only good for output. But, in general, I've found SPDIF to be a great transport for data.

Nothing wrong with S/PDIF but his options don't include it here. The alts are direct into mic jack or USB for which I'd choose USB. Didn't realize (not having one) his interface was F/W only.
 
If you're going to be doing this more often, you could do one of the following:
1. Get a F/W Xpress card
2. Get a F/W to USB adapter
3. Get an S/PDIF to USB adapter
4. Get another interface with USB
 
I have a MOTU audio express (F/W & USB) in great shape I'm not using anymore.

I use SPDIF with my Yamaha 01v for years with out issues. Best if you leave Sonar as clock, most devices are automatic sync and will just ask you if that's OK so set up is very easy. 
 I would run the 01v directly to my audio interfaces SPDIF in/out ports. This gives me all those extra pre amps as well as the returned playback for cue mixes. 
Many interfaces have SPDIF and they are included in in/out count. The Scarlett 6i6 they are the 5/6 in and out. On my Tascam they are 15/16 in and 5/6 out. 
One downside to SPDIF that is possibly true of all interfaces, on both mine the SPDIF inputs do not appear in the direct monitoring. You won't hear them at the interface headphone jack.  Not a problem for me as I do my monitoring with the mixer.