The best speaker wire I know of for a 20 foot run is the Audioquest Rocket 44 PREMIUM No Frills version from AudioAdvisor. It actually come in just under $1k:
https://www.audioadvisor.com/prodinfo.asp?number=AQPGRO44N&opt=3927|3933|3940|3944
Alternatively, you could do the normal "No Frills", but the PREMIUM has better spades/bananas. If you can't get a combination of spades/bananas that you want, just call them. They will custom make whatever you need.
https://www.audioadvisor.com/prodinfo.asp?number=AQRO44NF&opt=556|561|565|569
Solid core cabling always has done better. The copper on Audioquest may not be OCC, but it's close. I'd rather do this than use high grade stranded OCC copper.
https://www.audioadvisor.com/prodinfo.asp?number=AQPGRO44N&opt=3927|3933|3940|3944
Alternatively, you could do the normal "No Frills", but the PREMIUM has better spades/bananas. If you can't get a combination of spades/bananas that you want, just call them. They will custom make whatever you need.
https://www.audioadvisor.com/prodinfo.asp?number=AQRO44NF&opt=556|561|565|569
Solid core cabling always has done better. The copper on Audioquest may not be OCC, but it's close. I'd rather do this than use high grade stranded OCC copper.