Hi, I have a Sony Davs-888 home cinema surround system but now I want to upgrade to a HDMI DVD player to go with my Pioneer 434HDE plasma. My question is, can i use my current speakers and subwoofer with a separate AV receiver and DVD player or will they only be compatible with the DAVS system ?? Also, if I go down the separates route, do I need an AV reciever and an amp or just a receiver ?? What's the difference ?? Sorry if these questions are basic but I'm very new at this. Thanks in advance for any help.