This question might have been asked a lot but,can someone explain the difference between avpreamplifier,amplifier and reciever.I am looking to upgrade and Ihear alot about equipment like arcam, adcom,outlaw,rotel,NAD etc. I stopped at magnolia and they showed me the Pioneer elite VSX 74 TXi.Nice unit but, before I buy something I want to veiw all the other options out there.I heard this is a great site to get answers so please let me hear what you have to say.I would like ton know if there are any problems with any products to stay away from. Thanks Paul