Hi Daryl,
One word... TopNotch.
Apart from SoundCloud though... I'm pretty certain it's not your ears, and is my only complaint about SoundCloud, that they insist on at what 128kbps. MP3.com streamed at that rate in 2000, when most of us were on dial-up... So, I agree with Tom, in that any artefacts on the sssss's and what have you is an encoding problem.
Any chance of making this track downloadable, just to test the theory?
cheers
andy