Hi Robert!
What a nice rock mix....love the choice of tone and the solo work. If you're asking what we think I can tell you my OP on how it might be made even better....
I would load the original file back into your X3 and if you have a mastering plug-in I would start by setting it to a rock or indie rock setting and tweak for the mix from there. If you don't have a mastering plug-in, I would use what's in the pro channel. There are some decent mastering settings in the PC folder. Basically limit or light compress the entire mix. But not much. This has a few benefits, for one thing it gives you another gain stage before mastering and the light compression or limiting makes the mix slightly more aggressive.
If it were me I would take the opportunity to balance out the EQ by giving the mix a bit more mid range bite. The multiband compressor in Sonar is great for adding bass and midrange boost while letting the rest of the mix untouched...I have a bit of an indie bent, so maybe you like the mix as it is...I tent to like a little bite and clarity with more agressive bass. Hope this helps.
-Tim