congalocke
@ Marcus, I am not sure what resources the OP has. True an Axe-Fx would not cure mixing problems but it provides piece of mind in getting sound when recording i.e. "If I can't get good tone with this it must be something else." I have heard really good guitarists play with Digitech pedals and never wondered whether they were going through an amp or not. I seem to recall Steve Vai saying how he lamented about his tone with Zappa even though he had the gear (Marshall and Strat I think) and Zappa said that most of the tone was in the fingers...
I am not really a big fan of digitech. It is really amazing how much goes into getting a good tone. The cabinet, the mic, the speaker, the effects/pedals, the guitar, the pickups, and the fingers are all variables. even the thickness of the pick plays a part in the tone.
I go to great lengths to hunt for a great tone and sound. I even thought about running the TH2 program through my guitar cabinet and adjust just the amp without effects and then go back through my monitors to duplicate the settings. added a cabinet and used eq to try and come up with the exact sound.
When mixing I will do a number of things to get a better tone. depending on the situation I have used de Essers, and multiband compressors in creative ways.
right now I am designing presets for TH2. I wish I could afford the Fractal device.
I agree with everyone else, I think that the op should look into cabinet emulation.