The new "Single Channel" PlexiTone is not just for rock, it also can sound amazingly similar to a smooth vintage amp that just slightly cracks up when pushed, and as a fusion lead tone, with lots of both sustain and dynamics.
Check out Pete Thorn's demo of the PlexiTone here: http://youtu.be/XMmK0VwYR2M
Take jazz guitar lessons with Morten: http://www.MortensLessons.com
Read more about the PlexiTone: http://www.carlmartin.com/product_single_channel_plexitone.htm
Carl Martin PlexiTone (new 2012 model) Demo by Morten Faerestrand