I'd go for the Platinum Memovox for a couple of reasons:
(1) 250 pieces made
(2) only JLC makes a perpetual calendar w/alarm
(3) it is, simply, a more practical watch.
Now, I'm NOT saying I don't love the Duometer QL, I DO! But I see the MGM as a GREAT daily watch to wake-up to, to be reminded by, to check the moonphase, to... well, a lot. I LOVE the navy strap with blue dial, too.
So, I'd go for this NOW, and look to the DuoQL later as purely a dress watch.
Just my 2 cents.
-Dean