Just got back from GC and got the 1001rb-II out the door for $600 So far i am extremly impressed. The clarity just blows the ampeg svt3-pro out of the water. Not to say i cant get crunchier sounds out of the amp with the right settings aswell. First thing i noticed was the volume on this thing. It is incredibly loud at 10 o'clock. Waaaay louder than the svt. The GK is 18lbs, compared to the ampegs 26lbs, but coupled with the grundorf box, tuner, and power conditioner i couldnt really tell a huge difference. I am thrilled with my purchase and am very pleased with the GK.