If you already have an audio editor for your computer, I think that
the Waves Native Power Pack 1 or 2, or
Steinberg Mastering Edition suite would do a much better job in about 999 out of 1000 cases then TRacks would. Also, those plug in's can work with 24 bit files (sorry, TRacks can't. Keep an eye on the future friends).
Graphic EQ's are very cumbersome to use in mastering. They require that you adjust several bands on FIXED POINT EQ to do a general curve. As you start working on mixes, you will find also that you will need to address a certain frequecy center where the Cue (or Bandwidth, or how far above and below that frequency center the eq band will effect) needs to be tighter then a graphic eq will address. Graphic EQ's usually come in 1 Octave, 2/3 Octave, and 1/3 Octave flavors. I find while mastering that I often need to go a lot tighter then 1/3 Octave, and a Parametric EQ will let you sometimes go as tight as 1/10 Octave with a band.
Multi band compression COULD be a cool thing sometimes. I have only successfully used one once in over 7 CD's worth of mastering (this includes mastering sessions where I worked with a very experienced mastering engineer who didn't like using multi bands either). I am not knocking them, just that they are very hard to use, and more times then not, you will not find them as effective as a really good mastering limiter.
Something like
the L1 Ultramaximizer, or the Loudness Maximizer by Steinberg can really give your mixes a huge boost in overall RMS level. With a nice Parametric EQ in front of one of those, you can really address most of the issues that effect getting the most volume out of your mix. The use of a Parametric feeding a mastering Limiter is more or less the "traditional" approach to boosting RMS level.
If you are on a budget, and do not posses an audio editor that supports VST or Direct X plugin's, and want something that will do any "okay" job of increasing overall level, well, TRacks at around $300 will do the trick for you. But if you have an editor, and really want to have some tools that will can make your mixes start to pump, the some of the little more expensive Plug In packages designed for mastering will definately do a much better job. Don't forget to factor in the internal bit precision of whatever you decide to use....
(another story). Also, consider that if you have other uses for plug in's, then the plug in suites would be a better deal for you because you could use them at the mixing stage if you are using computer based mixing software. TRacks is a stand alone, proprietary software that only does one thing (and not all that great in my opinion).
Looks like a Mastering article is due here soon....
Ed