Just a quick thought....
....I have been running my mix downs through a software called "T-Racks".
It seems to be a reputable program, and I like the sound I get afterwards. At least, it's "mastered" enough to me likiing.
I just use the pre-sets, depending on what preset sounds best for what song. IT's extrememly easy to use.
I think you can download a demo somwhere.