Nordost Heimdall warm???

Hi, I have been reading here that some people think the Nordost Heimdall speaker cables are warm? Warm has never been an adjective used to describe Nordoat in the past. I currently have Blue Heaven speaker cables and I am actually pretty happy with them. They have been the one cable in my system that has survived my frequent component upgrades (maybe more out of laziness than its performance). Anyway, I was looking to get two sets of speaker cables to try true biwiring and the Heimdalls are on my list to try. I really like the speed, transparency, and detail of the Blue Heavens but am looking for a bit more fullness, especially in the bottom end. I wonder if I can get this in the Heimdalls? I am not looking to add or attenuate any part of the signal. I just want a really neutral cable. Your thoughts are greatly appreciated.