Hi. The distance is not a problem since your gauge is big enough. I would not spend a fortune on cables (what is your budget?) since I personally don't think that they can make a gigantic difference. I did however buy all MIT Terminator 2s (speaker biwires and ICs) and find them wonderful. Although don't pay list or they won't be worth it - a true statement for most "expensive" cables I think. I tried all kinds and found little variation between them but the MITs edged them all out by just enough in soundstage, bass, warmth, and detail to warrant me getting them. I am running Paradigm Reference 100v2 (LOVE them) and Mcintoshes.
Good luck! Arthur
Good luck! Arthur