Karma -- there aren't too many speaker cables that will do justice to the kind of system you're putting together.
So I hope you can put the Dart right between the speakers with spkr cable runs of not more that 2.5 m each way ;--)))
Top of the line models from one of these companies should do it (meaning provide balance and especially neutrality for that system):
Purist Audio design, Dominus (definitely)
Harmonic Technology, Pro-9 Plus (definitely)
Siltech, Emperor (definitely)
Synergistic Research (possibly)
JPS Labs (possibly)
Virtual Dynamics (possibly)
Do not get any cable that employs a network box, like MIT or Transparent, because I don't think WPs will benefit from them, and in general feel they do more harm than good (although Mike Lavigne uses two pair of Transparents with his darts and Von Schweikerts @ $33K per pair ;--)
van den Hul (probably not)
Ridge Street (probably not)
Audience (probably not)
Analysis Oval (probably not)
Audioquest (definitely not)
Straightwire (definitely not)
Kimber (definitely not)
Nordost (definitely not)
Cardas (definitely not)
XLO (definitely not)
Definitely = just buy it (and sell one of the cars)
Possibly = need to listen to it (then sell one of the cars)
Probably not = good product but not quite enough of everything for your system's quality.
Definitely not = could be for various reasons, from an obvious sonic signature to insufficient quality or questionable design (IMO of course)
There are quite a few I haven't even mentioned because I don't feel they make a product in the same league as your system. If I missed something that should have been in the 'definitely' or 'possibly' categories, please say so, and then get ready for a fight (just kidding!)
.