It does not matter if your Asian movement is new because 99% come dry, over oiled and/ or dirty straight from the factory. That makes them as unreliable as a used movement. Look here:
http://www.rwgforum.net/topic/134432-qa-why-do-our-a7750s-need-a-service/?hl=+need%20+service
In my opinion your options are:
-If you service your A7750 for 200 you will have a cleaned, oiled and very reliable movement.
-If you buy a new A7750 movement you still don't know if you have a reliable movement
-If you buy a second hand ETA 7750 you still don't know if you have a reliable movement
-If you buy a second hand IWC you still don't know if you have a reliable movement
-If you buy a new, factory sealed ETA 7750 you will need to lay down 200~300
-If you buy a new, factory sealed IWC you will need to lay down 500+
So if you ask me servicing is not a bad option. This is also more or less the point of my initial post