Hey guys, I said I'd answer questions on the 1st, and here we are...
The AX750 and AX850 are newer Seasonic-based designs. The AX1200 is a custom design from neither CWT or Seasonic. Reviews should be forthcoming, but the AX1200 is a rock solid product in our internal tests. We have been designing this product since the HX1000 launched - and now it's ready to go.