I use my DCX2496 for my budget arrays. The common analog crossover
with have the ability to adjust the crossover frequency, variable
or other methods like plug in modules, etc. It also has level controls.

But the extra features I use on the DCX are;

1. EQ
2. Delay
3. Full digital pathway up to the amp, but I will admit this is
not 'all-that' important as others imply.
4. The ability to store my settings in memory locations and you can
instantly recall them. I have at least 10 programs for my line
array, each has different settings for certain situations.

DCX has more features. One other feature I tried is the phase
adjust to 'check' the sound system and even though I don't have
phase implemented, it was a feature used for sound verification.