This thread may be slightly redundent but here goes. My current rig is a GK1001RB-II into a 410 and a 115 RBH. I also use an RBI preamp. I am very happy with this rig but every time I see a picture of a Genz Benz 750 or 1200 ....man....the brain starts whirring and GAS starts building. I love the looks of the GB and the front panel looks very interesting. The local store that sells Genz has never had either of these heads in that I know of so I have never been able to even try them out. If I were to purchase one it would be ordered without a try out. So what would I gain/lose by moving to a 750 or a 1200 GB? Or is it a sideways move? My first guess is that I would not need the RBI. As much as I like my GK the GBs seem to be a lot more.....hmmm....sophisticated? Thoughts?