I recently upgraded to Anti-Cables Level 4.2 flx, they blow away my old Audience AU24 and Wireworld shotgun biwire cables that both cost many times more, the Anti Cables were like $550 and I think they have a trial period
The nice thing is they are easy to manipulate and thin, best bass I've heard, most live and real sounding... And it won't cost you anywhere near $2k