I used to use the Sony remote that was the same style/size as the 1000 although much different functionally. I didn't like it as you needed two hands to do most anything. Nothing like a one-handed remote while being a couch potato IMO.

Also, IIRC, the Harmony One is the same as the Harmony 890 except in black and without the RF receiver (optional on the One and standard on the 890)for the same price. I couldn't see any other differences so I went with the 890 and never looked back.