Rear Surround Speaker Cable

[Yamaki]

As I set up the system in our new abode I realized I had no speaker cable to the back of the room for the rear surround speakers. So I need to add some.

The speakers are Vienna Acoustic Waltz units, rated 180W @ 4 ohms and they are driven by an amp rated 200W @ 4 ohms.

These cables will go under the house from one wall to walls on both sides of the A/V room. What gauge, insulation and brands would you fine folks recommend?

Thanks in advance for your input.