Hi Eccmt ,
I had the same situation as yours. I ve offered LHS position (B737NG) in my current company . But I decided to go for QTR 777/787. (My current company pays well and no bankrupt on horizon , expanding all time) The reason is quite simple I think. You will not fly as FO for infinity . One day you will definetely become a captain. Go for long haul. See new places. Experience different operaitons. Long haul rosters are much more better than narrow body ones. And Qatar will be the only 7 star airline in the world. I also read all positives/negatives things. I will leave my own country. It is more harder. Good luck.