These are great amps. My first GB amp was a Neo-Pak and I used it with a NeoX 112. Amazing little rig. I'm happy with my GB "mini-stack" right now (GB Shuttle 3.0 - 10T and 110 Extension cab) I'd be seriously considering this amp - and cab.
What is the difference between this and the Shuttles ? You say it has " better tone shaping " ? I don't see where the EQ is any different than the EQ on my shuttles.