what to buy under $500 bi wire spkr cable

If I understand the issue correctly, I also suspect the speaker wire is most likely not responsible.

Speaker wires may sound different, better or worse but not sure I have ever heard them result in "harshness". Not likely I would speculate, but hey, anything is possible. Hard to say without hearing/seeing.

Try tweaking the easy things first like speaker orientation/toe-in/toe-out relative to listening location, matching polarity of speaker wires from amp to speakers, etc.

If all else is well, the IC from CD to amp might make a difference even, usually more so and more likely than speaker wires. Power conditioning is another possibility but I would recommend getting the rest working well first as best as possible before tweaking there.

Often addressing these things is just a matter of better setup and integration end to end including with the room. The solution need not cost more, but more likely just requires things be done differently.

maybe harshness is the wrong word. just doesnt have that fullness i want. has any body heard the audioqust rocket 44 wire. what do you think?

how about audioquest rocket 44 in comparison to kimber 8tc.

"maybe harshness is the wrong word. just doesnt have that fullness i want. has any body heard the audioqust rocket 44 wire. what do you think?"

Well, as they used to say, that's very different!

I use Audioquest cv6 wires. These might provide what you are looking for at reasonable cost if you can find them used.