Any opinions for which cruise line would offer the best Greek Islands cruising experience in the Spring?

Of course, Seabourn is much smaller than Crystal, so the experience would be much different. Other than that, you can't go wrong with either. I would book itinerary followed by price. If Nancy weighs in, I think she would recommend Crystal. Let's see what she says.

Tom

Bentley,
Tom knows my preferences well - I LOVE Crystal!!! But, having never been on Seabourn I can't compare the two. As Tom already mentioned, due to the size variance, they offer totally different experiences. That said, if you are planning a spring 2006 cruise - you may not have a choice. To my knowledge, the only Greek Island cruises that Seabourn offers next spring are those that are longer grand voyages in which the Greek islands are just a very small portion of the itinerary and they may not be what you had in mind.
Nancy