I just ordered it. I own almost all the LOTR sets (and a handful of the Hobbit), but I've always been reluctant to drop the cash necessary for Orthanc. I guess it hurts a bit less getting $20 back in rewards along with the free Holiday Train, but still.
My other problem is that I don't have a lot of free time, so I usually end up collecting various Lego sets, sit on them for years, planning to eventually open and build when I can make time for it, and then find out that the secondary market price has ballooned to ridiculous amounts. That's part of the reason why I still haven't gotten into modulars. I own both Cafe Corner and Green Grocer minty fresh in box, but they're worth so much now I just need to sell them. #firstworldproblems