Lukas,
I have the same exact Amp. I also have the C545bee cd player and B&W CM7's (although I'm about to change both). I use chord crimson for cd to amp interconnect and audioquest GBC speaker wire. I use to use a different interconnet and recently switched to the chord crimson. I can tell that performance is terrific and I recommend the crimson cable.. Regarding the spearker wire, I'm in the camp of people that does not think it matters as long as you have good thick wire. I bought the audioquest wire because it was reasonably priced, 12 gauge, and looks very nice. Can't tell any sound difference from the old moster cable it replaced, but it sure looks nice.
What CD player are you using? You might want to spend your money their instead. The new NAD 545 is outstanding. WHF just gave it 5 stars and I fully concur. You will hear the quality for sure.