I decided to go with the Tauck Discovery Castles and Kings tour. They do Windsor castle and Versaille and is one night longer. I will report back on the boards when I have finished. I will be keeping a pen and pencil journal while there and will write a report when I get back.
I'm looking forward to hearing your impressions of Tauck. I thought their London/Paris itinerary looked great. They seems to do very well with booking too. Most of the Kings & Castle tours appear to be sold out, as well as a lot of their other itineraries. Our Yosemite trip had only 4 slots left open last January when we booked, so I never had any concerns about cancellation for lack of participation. I'm hoping for a good experience with them this year, so they will stay on our list for the future. I'm going to be snapping pictures like crazy and hopefully come up for a good submission for their photo contest. One of those travel voucher would come in very handy!