Barry - in case you haven't seen this video by Alex Ryan (forum member byudzai), it's a really nice comparison of a CF guitar (Emerald X-20) to a Martin and a Taylor. If you don't want to listen to the whole thing, scroll to about the 18:00 mark for the comparison.
Finding these videos helped convince me to give an X20 a shot after already having owned my Composite Acoustics OX-RAW. I enjoy both guitars, but the Emerald has taken top spot. It's just a bit deeper and richer with its wider body.
I also have a lovely late-90s Martin OM28v that pretty much sits in its case because it has to and rarely gets played anymore because the CF guitars are nearby on a stand, always in tune, and ready to play at an instant. It also needs a neck and bridge rest that my CF guitars will likely never need. Ever.