I'm looking for a remote to handle my new set up:

Westinghouse TX-42
LG DN798 DVD player
Motorola cable box
Pioneer vsx-517-k receiver.

I don't expect to add much in the future.

The harmony series looks like exactly what I'm looking for - easy to use and easy to set up, and I've always liked their styling.

Are there any differences in the harmony models other than button layout and screen type/size? I see the 890 has RF, but other than that, how do they vary?

Are there some features that some have that the others don't?

Should I be looking for anything other than button layout, look and feel, and price?

basically just rechargeable batteries. they all use the same software (i think), so it's just battery/RF/LCD, i think.