Looking at replacing my WDTV box which I stream to from my PC with a dedicated HTPC. 



I'm primarily looking to manage and view my vast collection of blu rays and DVD's and use something like XBMC to access.  I would also use it as the dedicated box for accessing Netflix which my PS3 is currently pointed at and then streaming that onto the Telly or Projector. 

The issue I may ( or may not have) is everything I currently own is connected using HDMI. All my video and sound are pumped down HDMI into a matrix switch and then onto different receivers for processing. It's a multi room setup that I use the switch for as per the attached jpg.

Having read some posts, I get the feeling audio over HDMI in a HTPC can be dodgy at the best of times and many posts seem to refer to lots of hair pulling etc.

I'm really looking for a decent setup, running on Windows that is a movie server first and foremost with a great looking interface for the kids and family to use. It wouldn't be used for gaming or much else for that matter ( apart from Netflix ).  I'm not looking to insert any TV cards etc at this stage as SKY gives me everything I need in that space.

I've created a jpeg to explain the current setup. Long story short - I have SKY, PS3, WDTV and DVD Player hooked through the switch so I can play different sources in the LCD and projector rooms.  A dedicate bluray player also feeds the projector room alongside the switch. Current setup lets me show any device in any of the two rooms at the same time so I can be playing PS3 on the LCD while the kids are watching SKY on the projector etc.  I'm keen not to break this setup if I can avoid it.

Any tips or advice appreciated prior to me offloading a chunk of cash to run into subsequent problems. Thanks again.