I have two HT's in my home, one is a fairly typical receiver based system with a half dozen sources. The other is an all out assault on HT/two channel and has a dedicated two channel preamp w/HT bypass in it as well as three (currently) Blu-ray players, reference CD/SACD player, TT, cable box, AppleTV etc in it and BOTH are 100% controlled by Harmony 890's, and yes, my lighting and fans are also controlled by them.......
They can be had for ~$150-200 nowadays and to my taste are superior to the new 900 model, I reccomend them highly!