MAYBE try running a distortion vst on it...
dial it in low to begin with, then crank it up...
that will add some grit, fill in some midrange, roll off some of the highs that are making it airy, and make it sound more aggressive.
what kind of distortion, or how much, is for you to figure out.
there will be a 'sweet spot' where it just happens.
if you have a tube amplifier vst, maybe try that.
i like the Voxengo tube amp
http://www.voxengo.com/product/tubeamp/