If you've been accepted to EK, don't consider QR. Especially on Airbus.
You should absolutely leave EU LCC for a number of reasons. Whatever you are looking for from the career is here: money, routes, travel, luxury/pampering, family life, girls etc etc. Anything you want is at your doorstep. Expat life is very good for kids under 14, and expat life is exceptional for single guys. The only counter is if you (or your wife) have a close knit family in EU that you would be upset to be away from (And bidding for a trip home every month or two isn't enough for you).