Thanks for the link, Silbenz, but I am puzzled that the Magnepan Users Group would be referring to recommended amplifier output at 8 ohms, when all the Maggies I know about are 4-ohm speakers. It's NOT safe to assume that because an amp has "sufficient" power at 8 ohms it will work well at 4; good ones (including all Outlaw stuff) will but many integrated amps and receivers will just overheat. Never try to use an amp whose specs don't list a 4-ohm power figure with a 4-ohm speaker.
So I'm afraid I don't trust the MUG table on this point.