To be honest, who really cares how antiquated the 738 is compared to the Airbus, the Monarch guys and girls probably won't care either, all they will want is employment and a wage coming in for Christmas, be that on an Airbus, 738 or a Dash 8.
Grennlights, you probably didn't mean to laugh, maybe it's the irony of what's happened and the industry is still short of pilots, I don't know, but seriously, no need.