Is there a particular power consumption/+12v power requirement I am not seeing here? Having two Row Power feels like overkill to me. If you do not already have the case with the Row Power modules, I would recommend a case such as a Tiptop Mantis, Doepfer, or perhaps the EricaSynths monster case. This would free up some hp and give you room for another VCA, or maybe a wavefolder/waveshaper module of some kind.