Advice For Audio Refinement + Vandersteen Combo?

Hey Everyone,

Just got an Audio Refinement Complete integrated to go with my Vandersteen 1C's. The sweetness and detail are pretty terrific, but it just seems like a little low end might have got lost in the process with this setup.

Current cable is just the standard 12 gauge wire that comes from Lowe's (using bananas on each end). Interconnects are various Esoteric Audio, Monster, etc., so I don't think they're doing anything harmful.

So I'm hoping that somebody can possibly suggest a 9-10 ft. cable in the $150 range (used or new is fine) that might help with providing the best possible low end? If the highs have to be rolled off in the process, I can live with that.

Vinyl is my main source of listening (Rotel RP-955 + Dynavector 10X5), and I prefer a lot of electric guitar music, etc.

Of course if cable isn't the answer to the dilemma, please say so...

Any help is very much appreciated!