Best cheap speaker cables............again

Hello all,
I will apologize in advance for asking this question as it is probably one of the most discussed topics
I am looking for some recommendations for a good single wire speaker cable. I am driving a pair of Vienna Haydn's with a pair of Cary tube mono blocks. My old speakers were bi wired and the Haydn's are not. I can't re terminate my current cables so I'm looking at some new wires. Budget under $300.00 and the runs are about 7 feet long. My initial thoughts have been Morrow, signal cable, AQ type 4, zu mission for new cables, but I am certainly not against buying used.

Thanks