a very neutral cable is the xlo signiture II. it is fast, detailed, clear, and very very neutral)
i have tried alot in a completly ss system ( tara, cardas ( all but the golden reference), harmonic, tech, transparent, wireworld).
and i am very blown away by the bass, imaging, and ability to pass the signal along unscathed and umsmeared.
seconds of the cable can be found @ fatwyre for $300 a meter pair. they also have a audition policy.
hope that helps !!
mike