After reading this review of the Audioquest Columbia cables I found to agree with him. REVIEW: AudioQuest Columbia Cable - readargos - Cable Asylum (audioasylum.com)
The bass was a little light when I first got them and I found the high end to be a little bright and a tad harsh. I played my CD player for 2 days/night in a row and already the bass is tighter, and the top end has calmed down a bit. But the open detail sound that lacked with my Mogami cables are still there.