I am going to have a Cat 6 cable pulled from my RF router in my office to my HT center. My HDTV, Pre/Pro, STB, and BDP all have an ethernet input, not to mention maybe adding a Roku box, etc. So, should I plan on buying a hub or switch (?) of some kind to allow sharing of this one cable? If so, are there any suggestions as to what kind or brand would be advised? How much money are we talking about? Thanks for any help.