Ethernet cable? What kind?


I want to run some Ethernet cables under the house and out to my shop so I can have interference free signal to run my apple tvs that are hooked up to stereos in the kitchen, bedroom and shop. Sometimes the signal is scratchy or drops out when the microwave is running. I was going to order some Ethernet cable but not sure what kind to get? If there is a future advantage to running cat6 or if cat5 is the way to go an will be sufficient?
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This is one of he most rational cable discussions that I have seen on Audiogon. 
we have the complete collection of ethernet cables: Cat5e, Cat6, Cat6A, Cat7. SF Cable is one of the best places on the internet for buying ethernet network cables as we offer our products at wholesale prices.