i'm looking to get a second harmony (have 659 now). my other tv set up has just a few things (hd tv, replay tivo, 211 hd dish receiver). thinking of using the 659 there and perhaps getting the 676 or 670 for my main system (info below). other than the media button i don't see much difference between the two remotes. i read about button issues on both... just want to get opinions regarding these two remotes (and others if you wish).

i have RCA HD
Denon A/V
Dish 733 VIP PVR
sony dvd
directivo HR 10 (temporarily in the set up till we clear the hard drive!)