in germany onkyo will present an 906 at the IFA this summer (september '08).
this receiver will be a "refurbished" 905 with some new chips and same design as far as I read.
in germany we have probs with the 905 on blue-ray's/hd-dvd's coming from the label "concorde".
there are some loud "bangs" on the dts-hd master layer by bitstream.
e.g. in Master And Commander, 12 Monkeys, Tomb Raider 2.
In a Statement of DTS-Global Product Manager to Concorde he said that receivers from Yamaha and Onkyo have defective dts-chips which cause the "plopps/bangs".