I just purchase this system and after one day i return it back . the quality of the sound be ok , but only when you play from the Sony dvd player . my plan be to use that system to stream audio from my blu-ray player , so I use the Optical wire to connect the blu-ray player with the Sony player but , the quality of sound be like 2ch stereo , I have try with all the audio setting on the Sony device with no luck . when I put the dvd disc in the Sony player the sound be pro logic 5.1 . I want to use that system as receiver , however , that do not work . so if you plan to do the same just get the one with -lrb- hdmus in -rrb- for external device . overall i rate this system 3 star because it play nice sound , however the menu on remote be nightmare , also the lcd display be small and hard to read from a distance .