No way in hell I'd go 320. I'd sooner stay on the 340 for a couple more years.
Especially in the face of the A320 turning into a low-cost department with the related lifestyle.
With all the broken promises they already gave (in fact: they never kept ANY promises), who knows if and when one would ever go back. For all we know, they might just suddenly take some DECs for the 330/340/777, and leave everyone else on the 320 forever.
The salary isn't that brilliant, and the 4th stripe not appealing enough for me to jeopardize my family!
If I want to fly four sectors per day (per night) for an average salary, I might as well go to Asia and get my life back.