FLIslandGirl3: In your situation, Peregrina651 offers good advice. Our situation is below.
We liked our flight itinerary for Iceland in July so we had it ticketed. We go over and return on a 737 in the forward cabin of 16 seats sometimes designated as Business Class, but on this flight apparently designated as Premium Economy. We don't mind the short hop up to Toronto to catch the flight nor the return home from Montreal in the same type aircraft as our international flight but in the designated Preferred Economy section farther back in the aircraft. Going to and from Iceland in nice, comfortable seating with pleasant service we consider a bit of "pampering." It is, after all, a vacation where we expect to receive a bit of pampering on the Viking Mars.