Well, as I recall, Nordost cables lean a little to the bright side of neutral. This is not bad in itself, but the NuForce amps are very extended and linear in the high frequencies, so it sounds like the combination could wind up sounding bright.
Of course there are other factors that tend to tame the brightness a bit such as using a tube preamp, or using copper-based power cords on the NuForce and some of the other gear, etc. Since I don't know what the rest of your equipment is (or even which Nordost cables you're referring to) I can't reliably predict what your final results will be, but hopefully the above comments will help.