I really don't think you will hear any differences in sound quality, especially in Direct or Pure Direct modes or with discrete 5.1/7.1 surround sound (non-matrix, non-DSP) espeically Dolby TrueHD, DTS-HD MA, and Uncompressed PCM. This is especially true in double-blinded testing. Also compare the specs - they all measure extremely accurate.
If I'm going to spend anywhere near $1K & above, I would get something that has a better reputation for reliability such as Denon & Yamaha.
But getting something like a brand new Onkyo 806 for $600 from amazon.com (free shipping) is hard to resist.
Video scaling and processing is not a factor if you are watching blu-rays.
Room EQs are not always that helpful to everyone. For example, most reviews I've read tried the EQs, but then end up bypassing it altogether.
I've tried the EQs several times also, and I always ended up bypassing it.
Onkyo Pros:
1) Measured Specs are outstanding (Power, THD%, SNR, Crosstalk, FR, etc.)
2) Features
3) Lower Price
Cons:
1) Heat issues
2) Reputation of "not being as reliable as Denon".
But if a $600 Onkyo 806 lasts 5 yrs and a $1,200 Denon 3808 lasts 10 yrs, it comes out the same on Average Overall Cost.
