Which is the best Buy: Shielded and Unshielded Ethernet Cables?

Unless you have a really noisy and crazy environment you are running the cable through UTP should be just fine. I have UTP cat5e I ran years and years ago, every once in a while I put a managed switch on the network and never found any dropped packets.

I run with a group of audio guys in Denver that don't fly the mainstream rhetoric. After some testing, it was determined that the CAT 7 & 8 extra shielding of each twisted pair induced audible and additional noise & distortion. 

I know the "expert" computer jocks will tell you this just is not possible. And I have found that some CAT 7 made for audio is quite good. As for me, I use CAT 6A. Consider that the positive respondents on this little forum mention CAT 5 & 6. Before you invest in wiring the place, I recommend you actually listen to a piece of whatever you think you plan to use against the older standards that we prefer. Cheaper per foot too. That advice to have 10 gig wire is overkill unless your looking to be ready for double HD4 video, which is twice the density of the filmmakers state of the art today; at least the last time I sat in front of a non-computer video screen of about two years ago.

Ultimately, you need to make the distinction between whether you are an audiophile or a movie buff. Audiophiles only care what it sounds like to them, and that is where I live. 

Bill

Thanks to everyone who has reply my question. and help me to select an ethernet cable for business & home.