Any experienced plumber should be able to intall a Toto toilet with no problems, however there are a couple of things to note about them.
#1 Because of the "G-Max" design, which gives it those excellant flushing charateristics, there can not be any baseboard heat placed behind the toilet. Traditional American toilets have a large curvature in the trapway; G-Max toilets, and now the American copies that are cropping up, do not. Hopefully this will not affect you, putting baseboard behind a toilet is not a good idea anyway.
#2 Some Toto 1 piece toilets use a boot for the hook up to the toilet flange. The best description comes from Toto themselves; "A UniFit rough-in comes in 10â€, 12†and 14†rough-in sizes. It replaces the lower half of a toilets’ trapway, and easily mounts to the flooring." Although its not hard to install, it is just different and since the toilets you listed are of the 1 piece variety I thought I'd mention it. The reason the do this is "Finding a stylish, high performance toilet with a 10†or 14" rough-in had been difficult and expensive until TOTO introduced our skirted toilets with UniFit rough-in’s.Odd-sized toilets can typically cost 60% or more than a standard 12†model. With UniFit Rough-in’s, installation is simple as you have no mis-alignment, no faulty seal, and no collapsing wax ring. Skirted toilets are also great because they have a larger footprint, which help to cover up floor imperfections from the previous toilet.