I'm not a tube guy but you might want to check out Lavricables out of Canada. Their cables are light and flexible. They are pure silver if that's your preference. They have 4 levels to choose from. Depending on the model you choose, you can get 8 feet (2.5 m) for under $1000.
Speaker cable recommendations
I have a tube preamp with SET tube amps. Currently my IC’s are Audio Sensibility Statement RCA’s. I’m looking for new speakers cable that are light, flexible and that would have synergy here. Budget under $1k
previously I’ve enjoyed Audio Sensibility and Cerious speaker cables, but they are too bulky and heavy. So maybe something with similar performance but thin and flexible. As I’ve been reading I’m thinking I’d like something with air dielectric.
some options that have popped up could be
Grover Hoffman Pharaoh
Audio Envy SP12
Zenwave SL17
looking forward to sow ideas.