The Shunyata's, like anything else, are system dependent. I bought two but my stock cords worked better so they were returned much to the dealer's amazement. I have found several other upgrade cords that do very well indeed so I'm not at all of the 'wire is wire' mentailty.
Yul I'd also be interested to hear from anyone who's made the Whale vs. Fatman comparison but as I just stated, what they hear at their house just isn't going to match your own experiences. I did buy a couple of the less expensive BMI Eel's but I'm not too impressed, while others here just love them. Go figure?