I am considering the 1800, Pioneer 92, Marantz 7002, the Onkyo 705 or 805. However, it is tough to find a place with all of those. With the 5000, I don't need the video scaling. My TWC box doesn't have HDMI, and we don't need to listen to the receiver for TV so I'll live Toslink out to the receiver from the STB, and analog audio to the TV.
The receiver is going to be mostly for music, so it has to perform well in my ears with my music.