I love my Variax, but I've been underwhelmed by the acoustic models. The large body models sound too boomy to me, and I get a lot of unwanted string noise from them. I just ordered a Firehawk FX hoping that the acoustic presets will help (and for many other reasons). In the meantime, I did find a plug-in that makes the Variax acoustic models sound unbelievably AWESOME! It's by Waves (sorry Line 6) and it's called Maserati ACG. It's a mixing/mastering plug-in designed specifically for the acoustic guitar. It's basically several effects like EQ, compressors, reverb -- all rolled into one package. I haven't gotten to mess with it too much. I did go through all the presets though with the different acoustic models. As usual, some weren't too good, some were ok, and several were awesome. But the ones that were awesome were truly AWESOME! The acoustics really shine running through them.
It was $29 and well worth the price I think. Of course, it tethers you to your DAW (another reason for my getting the Firehawk).
If anyone knows of another plug-in that sounds good with the Variax acoustic models, please post it here. And also any tips on getting a better sound from the twelve strings. They sound a little digital to my ears, especially on the lower strings.