looks like an EII in the background of your avatar. Do you still have it? I used to own one.
We're having a lot of debates on hybrid summing. Its a touchy subject.
I have a big Hybrid rig and all I can say is the more hardware you add, the more fun it becomes. Without the hardware added, its not much to work with. Its my opinion, once you get a good amount of choice hardware, and learn what to do with it, it becomes apparent how powerful these summing boxes become. The concept is brilliant.