HELP Best Interconnect for LINN Karin Pro/Pre-amp

I need some help in a interconnect for the Linn Karin Pro Pre amp..I'm going around in circles from good to better to bad....I started with the Tara Labs(RSC Prime) which sounded so so but bright Then tried Audio Quest(Jagaur)still bright and constrained,and then upgraded to Harmonic Tech Pro SilwayIII which sounded bright and edgey but were the best of the group so far...The Linn is a bright Pre to start off with and the HT just brought out more brightness....
I need something real (warm)almost tube sounding type of interconnect..Any Suggestions HELP!!!
Your comments are well appreaciated....The amps I am using are LINN KLOUTS which match the pre well