RCA Interconnect suggestions RCA

New here. I've got a modest desktop system, currently Audioengine DAC D1 to PSB PS1 Alpha powered speakers, cabled with a Pangea USB and Wireworld Oasis 6 RCAs. I'll be auditioning some Emotiva airmotiv 4 speakers soon (also have Audioengine A5+). While I'll work on the USB cable eventually, right now I'm wondering what analog interconnects might be worth looking at in the <$150 range (new or used). The reason for asking is that for all the Wireworld's wonderful qualities - plus I got them at big discount - I don't find myself engaged by them. No singing along, snapping my fingers, wanting to get up and dance, etc. Call it overly mellow. Any suggestions? Thanks,