I think you will have a great cruise and I am looking forward to hearing about it.
Keep in mind Prince Albert is a small ship, so have your Bonine ready for Drake's Passage. But once you are in the polar region it should be smooth and beautiful sailing.
The Silversea staff will really take care of you. The dining staff is excellent and will prepare (almost) any food you want if you give them notice.
Be sure and take all water-proof clothing - all your excursions will be in Zodiacs, and it is possible to get wet if they are traveling fast.
I can't wait to hear more about it.