Recently purchased a 3910 and have been having mixed reactions from it. Firstly wouldnt play the majority of the dvds I had. Admit some were aged discs but they have played fine in the past and also play play fine on the new samsung HD748. (they are originals not burnt copies!) Some of those that did play would only go for about 30 -45 min then major macroblocking and ultimate picture freeze. Some also exibited major vibration on start up in the player. These sysmptoms persisted for about a week with Denon (via the dealer) maintaining that the faults were caused by the quality of the discs not the player. Have since purchased a no of new discs and (to be fair) most problems have gone away.(what do I do with my older ones?) Still get the occasional macroblocking. Surprise, however, some of the older discs also now play as well but very hit and miss - will play one day then freeze or not be recognised the next. It would appear that the player can only tolerate pristine discs or it will spit them out or there is a tracking problem somewhere. Had a Sony some time back with a similar temperament. Have been running on DVI to an HD lcd screen and while the image is good I cannot really say there is any noticeable difference between this output and the DVI from the samsung HD748 that was about 15% of the cost.(and it plays all my discs) Also brand new out of the box only has firmware ver 3 installed. Will upgrade to 9 and see if any difference but suspect the problems I have experienced are not related to firmware. Really couldn't recommend this player, Lot of $$, Denon support absolute crap and a dodgy player at best. Regret buying it - Dealer and Denon wont take it back as they maintain there is nothing wrong with it.