Nordost likes to use 16awg conductors. Whether or not they are solid-core, I'm not sure.
I like to take an Audioquest NRG-4 power cable and chop the ends to re-terminate using Furutech FI-28 rhodium plugs for IEC and Male. The stock Audioquest power cable is very nice, but the gold-plated connectors just do not give me enough resolution for my tastes.