James,

A good song. Good instrumentation with a "modern" treatment. Nicely done.

The vocals are nice - good "space" to them.
As ray implies, the sibilance is apparent. Some of that might be the order in which you are applying the processing. Is it in the order you list? If so, try putting the De-esser at the beginning instead of the end. The EQ should come early, too. You might look back at the Off-Topic thread that Mario started about De-Essing and give the manual process a try. Should be easy in Sonar...(it can be tedious the first time you try, but after a while it is pretty fast)

I like this. Good to see "current" style productions in the showcase...

fj