M-audio's Maximum Audio Tools (!) bundle varies over time. Currently, there isn't much to tempt you apart from maybe the special versions of Ableton Live and Reason (cut down ones of course). At this time, the contents may have changed again.
I've a feeling Digidesign are the only hardware supplied with an application you might actually end up wanting to stay with, provided Pro-tools is what you want.
I suggested the AP192 because it's more or less a straight swap for (presumably) the original AP2496. Drivers are the same, you probably won't even need to do a reinstall if you put the new card in the same slot, and you can use both cards if you want - the driver you already have supports up to 4.
If you've already invested in good outboard pre-amps, the M-box's included ones will give you extra choice, but not be absolutely necessary. The new AP192's balanced i/o will make better use of your outboard pre's.
The original AP2496 is actually very good. You might want to consider the rest of your audio chain before replacing it.
Pre-amps, the monitoring and studio acoustics can have a far greater bearing on the accuracy and your perception of the audio quality.