I have the infinity hts20 speaker sat system with 150 powered sub. Picked it up for $279. I need reasonable receiver. Looking at denon 1804, Onkyo txsr600, kenwood vr 7070. All similar price. Some have said onkyo volume neeeds to be up very high. Also kenwood has thx. Onkyo and denon have onscreen display. I am learning but I still need advice. Any suggestions? What about the speakers? are they ok? I have not even listened to them. Thanks