I think one shop dropped the price and the others followed suit. found this on a forum:
The new models, due in the Autumn, all take the -6 suffix and feature improved specifications over the models they replace.
Upgrades include the Audyssey Dynamic EQ system already seen in the
less expensive models, THX Select 2 Plus certification (which includes
THX Loudness Plus), and more HDMI inputs, with the -806 having five ins
and one out. The TX-SR876 also gains an extra HDMI output, only
previously found on the TX-NR905.
The joker in the pack is the PR-SC886, a preamp/processor complete with
7.1-channel balanced outputs - its spec looks a bit like that of the
TX-SR875 without the power amps.
The styling of the products is so like the existing ones that the
presentation our man has seen simply uses pictures of the old models,
though there is a slight sharpening-up of the looks of the silver
versions, and of course the new remote handsets seen with the TX-SR606