I would tend to agree.
If you are using the HDMI connection and that specific Yamaha decodes audio over HDMI, then the jitter purifier will be engaged both for PCM and for bitstream. Apparently it creates a new, more accurate audio clock from the video clock and this reduces or eliminates jitter. As to whether you can hear a difference or not, that may be subjective. The feature cannot be disengaged so you can't really do A/B comparisons. I have had the BD85 hooked up to my system using the multi-channel analog connections so far but will definitely do some HDMI listening before completing the review.
Yup. Disabling the analog video circuitry by turning on "High Clarity Sound" is a good idea if you aren't using the component or composite video outputs for anything as it will eliminate any potential interference between that processor and other components.
SD or SDHC 1 GB or more will work to enable BD-Live, but a faster (class 4 or above) SDHC card is best. I noticed differences in load times on the BD-Live-heavy "Inglourious Basterds" when using a plain old 1 GB SD card vs. a 6 GB Class 4 SDHC card. Having a little more than 1 GB means you won't have to worry as much about clearing out the card if you start to accumulate any BD-Live content. SDHC cards are cheap - I'd recommend picking one up on Amazon, along with an HDMI cable. Since you're a Prime guy, you won't have to pay for shipping. I've been using the Amazon Basics HDMI cables lately and so far so good. Here are a couple of links/suggestions:
I believe you'd need YCbCr 4:2:2 for your TV. I am not sure it will accept a 4:4:4 output signal. But you can try it. I think it will set itself back to 4:2:2 mode if it cannot accept the 4:4:4 signal. You can get into the "Playback Information Window" (via the "Display" menu to confirm whether the player is putting out 4:2:2 or 4:4:4.
-CB