You can get wire bundles that have dual cat-5e and dual rg-6 all together. You can also buy more expensive bundles with fiber. Run that everywhere and you've got a lot of flexibility later on down the road.

Personally, I don't see much point in spending the extra money on cat-6, nor on fiber. Ethernet in its many forms is an excellent way of moving your bits around. Also, I think, if you really want, you can even do HDMI-over-twisted-pair. Not sure how well that works, though.

Things to think about are running cables not just to panels on the wall near the floor, but also to strategic places along the ceiling where you might wish to mount a wireless base station or other future gizmo (network-connected video projector?).