I think you pretty much answered your own question. Unless you are looking for a very different cruise experience I would stick with what you already know and like. Personally, I like the smaller ships, but I'm 64 and not that interested in all the goodies on the larger ships.
If you are really interested in a small ship experience in Alaska look into Cruise West; they have some wonderful ships, less than 200 pax, and can go places even Pacific Princess can't.
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