Apogee Centaur Major or Magnepan MG-20/20.1 ?

Tough one. I've hear Maggies 1.6 (not the 20 or 20.1) and own the Majors. To my ears, the latter is the best sounding speaker I know, except maybe for Apogee Scintilla's. But offcourse I haven't heard all speakers around.
Crossover between the 10" woofer and the 3,3 ft. long ribbon is at 350 Hz. Since Everything above 350 Hz is handled by onde driver, sound is smooth and even, with no phasing-problems. Sensitivity is low but impedance is smooth between 4 and 6 Ohm. It does need some breathing-space and should be positioned at least 3 feet away from the backwall. But I guess the Maggies will need as much space...
Seeing that you live in Holland you might consider listening to my system. I'm located at the center of Holland, very close to Utrecht. Then you can make up your own mind about the virtues and let-downs of the Apogee.

The mid/high ribbon for the Slant and the Major is more or less the same, but the woofer isn't: the Slant sports an 8" Vifa woofer, where the Major is fitted with a 10" Peerless woofer. Hard to compare the low-end performance...