Hey, Slanglican, gorgeous watch!
I'm sorry to rain on your parade, but an ETA7753 - or an A7753 for that matter - won't solve your pet peeve. While any of those two movements would definitely make the datewheel to be flush with the underside of your dial, it would also cause the datewindow to not exactly match the 7753 datewheel position. If you compare technical drawings of the 7750 and the 7753, you'll see the datewheel is slightly larger (in diameter) in the latter. It is a minute difference, close to 0.5mm if I recall it correctly, but it is enough to make the datewheel obviously off-centered.
A long time ago I purchased an ETA7753 to correct - I expected! - the sunken datewheel on one of my Montblanc Timewalkers. I ended up with a non-sunken, off-centered datewheel; I could see the copperish teeth of the datewheel and missed a small part of the last digit of the date! I then reinstalled the chinese, stock, modified A7750 movement and came up with a laborious, artisanal modification to raise its datewheel. I have since employed this modification on several of my watches, with a varying degree of success.
