I want to update my home theater. My current system is dated but is of very good quality. Fosgate mod 4 processer with three Acurus A150's, Skell type K/II five of them all the way around with a Snell THX sub. I have recently added a Panasonic RP56 DVD and new VHS. Now I want to upgrade to Dolby Digital EX and DTS-ES. I have been looking at the following. Denon 3802, Integra 7.2 and Yamaha 1200. I would also add a powered sub in the near future as the current Snell is passive. My room is an average living room 20'x12'. I was thinkg about buying one of the above recievers and using it as a preamp, going this way I really don't know if I would hear any real differences between the three units listed above. If I did not use the amps I already own and use just the reciever alone then I believe It would be a different story. Any opinions on which reciever you would go with?