ExoticSkier,
I would be of the view that Jet2 are sufficiently differenciated to the competition, they are progressive in the tour operator space and as a specialist, Ryanair, easyJet et al cant touch them. Who else could dream of going until Stansted (next year fleet of 9/10 on strength there). On the fleet side they are progressing nicely with their modernisation program with plenty of new metal coming onstream. The smaller machines will soon simply have to exit and probably given the highly seasonal nature of NI routes, makes such a size perfect.