I second Clio09 on the Mogami cables. When I decide to move from RCA to XLR, I tried a couple high end cables, borrowed, and then tested very cheap XLR cables and only heard a slight difference. Because there was a difference, I then rushed to Guitar Center and bought Mogami Gold cables to complete, the now oh so tempting, A-B test...could not hear any difference in the $36 cable compared to the $$$ XLR cable. I really tried to hear the difference too...I have the funds and wanted to justify more cool toys but I just could not.
My buddy who I borrowed the cables from was also a bit chagrined as we tried guessing what cables were playing and it was a 50/50 toss up in accuracy...in short, just a guess as to what was playing. :)
My system retails for some $35K+ so I think it was somewhat worthy of making good use of the $$$ cables.
For now, until I can find something that just wows me or I just have an itch to burn some cash, I am sticking with the Magami cables. My nice RCA cables will move to a 2nd system I am putting together.
-NAK8