What about an Autronic and Power FC pro?
If you are using a big turbo (or big sets of turbo's for that matter) are you only restricted to using air flow meters? It's a general rule that if you go the high mount turbo you should loose the AFM.
Also the Motec and Autronic units are far superior to the PFC. Both the Motec and Autronic can handle the 6 throttle bodies and do not require AFM.
I am sure there are advantages to going the big single as s13drifter said. However, I am yet to be convinced.
The fact of the matter is, nearly all quick track GTR's and quite a few quick drag cars retain the standard throttle body set up. Mines swears by the set up!
Please don’t think I'm trying to force my opinion on anyone I'm just stating my point of view.