We're running wire for the first time this season, set up one pole with Torpedo 7 strand and bought one already rigged with Torpedo 19 strand. It's the least expensive and had the highest breaking strength on a wire comparison video posted on Youtube.
We'll form our own opinion and go from there. The standby choices seem to Mason and Malin with AFW a close third; torpedo wire is the newcomer on the block. I noticed prices went up 5 - 10% across the board this season for wire.
From what I've read, most use 30 - 50 lb powerpro, setting up to run up to 600' copper. I've never set up for copper but if you're only running 300' copper, 20lb powerpro might be able to handle it.
No, I've got them on riggers rods with mono.
Speaking of a good deal, mine were Craigslist specials. Never break up with a woman and leave your gear in her basement - I got both rods and reels for a total of ten bucks