Kevin - Let me see if I can help a bit.

I wouldn't use a ribbon alone on an acc/elec. But that is just me.

When I do record acc/elec, I too use a mic, actually a pair of mics, AND DI(11r).

If you have a nice room and want some of that warmth added if you have bi-directional mics you can use the Blumlein Configuration and add in some DI to the mix.

Personally I tend to just use a spaced pair configuration Condenser Microphones set about 2.5ft away from one another. One is pointed towards the 12th fret of the acoustic guitar and the other is pointed toward the sound hole.

Or if you can only use one mic, use a large diaphragm condenser about 12"from the sound hole.

Then for the DI I turn off any amp model but I will use EQ and Compression and record the wet signal. Remember you can only process ONE signal through the rig.

I have also used the mic input on 11 Rack and connected the acc/elec directly to that and used a good 2 channel mic pre into int 11R.

Did I help ya there or just confuse the issue.

Here is one that I recorded a few months ago. It is me playing and trying to sing. I recorded it using the spaced pair method into a 2 channel mic pre to line in on the 11 rack as well as the guitar output connected to guitar input on the 11 rack. No amp model but EQ and compression. Click here to listen FX processing in the mix though with some creative panning etc., but I think you can get the idea.