Looking for your opinion if you have giged with either of these. There is a SWR 610 at my local GC and a GEnz at my local independent guy. I have a Genz shuttle 9.0 head so I'm leaning in the Genz direction, but want to hear some feedback from you guys who have played them. OR the Ampeg SVT 610. One of those at GC as well. So what do YOU think?