I am looking to upgrade from Prologic to 5.1/DTS. I bought my Denon AVC 1530 from my brother when he upgraded to 5.1 last year. It was my first set up which I set up with Celestion C1 Centre, Celestion F3 fronts and Mission 77DS rears. Tosh SD2109 DVD Denon TU260L MK2 Tuner. Unfortunately my bro had lost the instructions but helped set it up consequently I do not know much about how good it is compared to others. I'm looking at the Sony STRDB940 or Yamaha DSPA5. Any views? Also any ideas what the Denon amp and tuner could be sold/PX for? Both in excellent condition but no boxes or instructions for the amp.