PVR/XMBC Solution

Hi guys, I am new here, and new to the concept of an all-in-one solution, which is what I am hoping to achieve with XBMC. I currently have a WMC PC right now, but it is only used for movies, and other video files, but I would very much like to get rid of my cable boxes, though I am not ready to completely cut the cord, since the girlfriend still wants tv... That being said, I have done some research, and XBMC looks like it does almost everything I want it to do, but I wanted to ask here to see if it does the rest as well, so here is what I am looking for my HTPC to be able to do, in order of importance:

- Stream Live TV to any TV in the house (I have 3 TV's, XBMC PC would sit on the main TV)
- Stream recorded TV to any TV in the house
- Stream DVD/BluRay discs to any TV in the house
- Stream ripped Bluray/DVD files (mostly mkv files, a problem with WMC and Xbox)

Those are the major items I would like, and I know that XBMC does some of them very well, what I do not know, is will it support MKV natively, and surround sound with it? Also, the top 2 items are what I have a hard time finding answers for. I understand that DRM can be an issue (I am on FioS, so I think it is less of one). Also, it would be great if anyone happens to know the answer to the following 3 questions:

- Can I use a Raspberry Pi board as a suitable extender for the 4 items above? I would want 2 of them to do this
- Can I wake an extender, and the main PC with a remote control, like I can with a STB from Verizon?
- If a recording is scheduled (assuming the PVR builds do what I am hoping they do), will my HTPC automatically wake up in order to record, and will it wake up early enough to boot up and not miss any of the recording?

I apologize for the wall of text, and am really thankful to anyone that can help me out!