Hi there,
thanks for the nice comments and welcome to the forum.
First thing that I should say is, that as you have mentioned, at the moment neither the 1075T or 975 CPU's are supported by the motherboard. Without a BIOS update you won't be able to use either of them with the board as it is now, as the current BIOS will not support them. A future update might allow their use but again, as you have pointed out, without a way of updating BIOS you won't be able to run them.
With that in mind and depending on your budget then a 1090 or the 1055 are both good CPU's that are excellent when it comes to encoding Audio and Video. I have a 1090 and I do a lot of Audio/Video stuff on my PC without an issue. I have also used the 965 and again it is a solid performer. If you can run to the extra cost, a Black Edition CPU would be the best choice as it allows for easier overclocking. Do not be tempted to buy an X2 or X3 in the hope of unlocking the cores as this can lead to problems.
The advice about using 1333MHz RAM at 1.5V is one I fully agree with and will give the best hope of system stability. If you buy a BE CPU then you can overclock it much easier and without it affecting your RAM. I got my 1090 running at over 4GHz but, as I don't really find that I need the speed, I have now pulled it back to stock settings.
The rest of your components seem fine and I don't think that you will have too much to worry about, when it comes to putting things together.
To run Virtual Machines you will need to Enable the Virtualization option in BIOS. This is normally found under the heading Advanced BIOS Features.
I have no experience with Linux on an 8 Series Mobo so can't offer any practical help there I'm afraid so, I will leave that to other member's of the forum.