Sounds like we have covered the bases! Are you having someone do the install or do you need some help walking through a DIY installation? If the latter, have a look at the sticky at the top of the toilet thread, and let me know because I have a few other pointers. How exciting! I know you're going to love them!
My plan is to have the flooring guys who are putting in tile, take a first attempt at installing the new toilets, then consider a plumber if they cannot. In either case, is there any advise on what I should inspect closely so that I get a quality installation done?