The street price of the Toto Drake on a 10" rough-in (and Comfort Height) is right around the same price as you paid, give or take $20.
AS does have some reliability issues, but a lot of what you've been told is just garbage.
You've read this forum, so you know that Toto's quality is extraordinary, and that the Toto Drake flush is legendary.
It would be truly insane to pay $400 for a Kohler when you can order the Toto original Drake for $240-ish (or less) in white and get a better toilet. CST744EF.10 is the model number.