Yes, directly connecting with cables is always going to be the best way especially if you want to play HD files. This is why I was asking you why you wanted to have the PC in your office.

Your next problem is how you are going to control your computer in the next room while watching the TV. Look at these RF remotes, they will work from room to room:

[Link: soundgraph.com]

[Link: soundgraph.com]

If you get one of those marmitec remotes let us know how it works. Maybe do a review on it here.