There are two sides to understand; pre-processing/decoding, i.e. taking the Dolby Digital (various) or DTS encodings off the DVD (or the new HD formats for BluRay) and transforming them to multi-channel analog and "post-processing" where various steps towards timbre matching, etc....are taken by the algorithms in the processor. THX Ultra, and THX Ultra2 are examples of things that are post-processed. I'm no expert,...I'm giving you the layman's interpretation of all the various materials I've read and the equipment I've used over the years. In a nutshell, if you don't have the post-processing options, you can still decode and play Dolby Digital, DTS and other newer standards (according to what your processor will support) in their native formats and be very happy. I happen to have liked THX Ultra2 post-processing for my 7.1 system but that was largely a personal preference.
All of this is a lot more readily explained via phone/email so drop me an email and we can hook up so I can explain all the background behind this and answer any questions that you might have additionally.
I do not have experience with the Denon or McIntosh pieces you list immediately above; perhaps others can help you there. They do have good reputations...
If the processor does not have HDMI inputs, that does imply that video will not come out (and you cannot input HDMI audio either). For those processors with HDMI support these days, you should also pay attention to the version of HDMI that is supported so that you get the most out of your HDMI audio and video both now and in the future. Again, this is another topic where I'd be glad to explain in detail what I'm talking about...
All of this is a lot more readily explained via phone/email so drop me an email and we can hook up so I can explain all the background behind this and answer any questions that you might have additionally.
I do not have experience with the Denon or McIntosh pieces you list immediately above; perhaps others can help you there. They do have good reputations...
If the processor does not have HDMI inputs, that does imply that video will not come out (and you cannot input HDMI audio either). For those processors with HDMI support these days, you should also pay attention to the version of HDMI that is supported so that you get the most out of your HDMI audio and video both now and in the future. Again, this is another topic where I'd be glad to explain in detail what I'm talking about...