Need a 50 ft ethernet cable to run a connection from my wireless router downstairs to my new desktop I'm getting built upstairs. Went to the store only to see that charging a ridiculous $48 for this at staples. Saw that there are plenty of them on newegg for anywhere from $10-25. Any recommendations on the 'best' one? Not sure if there is really a difference between them other than like durability but figured I'd give it a shot on here and see if anyone has any recommendations. In the store, one box said a Cat 6 was twice as fast as a Cat 5 or something, not sure if that's even true or what the differences really are, but any help is much appreciated. Thanks.