Unless the 200 and 755 have fundamentally different engineering, the large difference in max power consumption would seem to indicate that a stack of 200s could provide much higher sustained output than the 755.

Unfortunatly, you'd need to have two dedicated 15 amp circuits to supply 3,500 watts... so the real limiting factor may be your home 120v wiring.

I've got a $1900 Pioneer Elite HT receiver that's clearly and severely limited by the current delivery capabilities of it's single shared power supply. If you have low impedance speakers you really need to be concerned about this since the output wattage must double as impedance halves, and moderate priced gear like the Pioneer or Outlaw just can't do it when running anywhere near their rated output. This isn't a cut on Outlaw - you gotta look at something like Bryston costing thousands to avoid this sort of limit.

If I had the rack room I'd go with a stack of 200s since Outlaw's own specs seem to indicate that a single 755 does NOT have a power supply anywhere near five times the size of the one in a 200.

I used to think this stuff was only theory, but after comparing my Pioneer to a Bryston 3B it has become "real world" for me...