In your position I would take the command.
Given your age, in the Middle East. Especially the time to command at the airline you mention has only been going up and up to that of almost legacy carriers.
The Middle East is certainly not the best place to live. I think everyday you come across small complications which makes one realise this.
For children there is a lack of activities, compared to ones home country. Quality of schooling does not compare to back home either.
If the A320 command gives you time at home working for a relaxed outfit on a similar pay package to that of an ME FO with no 3-4 year bond as found with ME carriers then I would take the A320 command any day. After 2 years of flying the A320 as captain, your future is pretty much secure in terms of finding work elsewhere should things go wrong. As well as being able to consider joining two of the ME carriers as DEC in the future.
Good luck! : )