Bi-amping with a digital crossover has it's pros and cons. Everything being equal the all digital crossover has the edge. It gives you a ton of flexibility and keeps all of those passive components out of the signal path.
However, you are limited to the quality of the D/A converters used for each channel.
My standard D/A converter with mods cost me about $2,000. It easily is in the cost no object performance category. The D/A converter in those digital crossovers aren't even in the same ballpark. The difference is big.