Well, after some research, I decided to go with the Lippert Solera in white. There was a very good price on Amazon. The Dometic looked very good, and I guess is the best seller, but was over $100 more. I have a number of Lippert components on my MicroLite 21DS, so I guess you might say I'm staying in the family.
Would be interested in hearing people's experiences with their slide toppers.