Go Active Crossover or Upgrade existing XOs?

Wow, now that was group of very well laid out responses. 
-Millercarbon's point is not something that can be ignored.
Perhaps most speaker manufacturers just don't want people
adjusting the sound they worked so hard to create?
-dicarmeli exposed me for the ignoramous I am in this endeavor.
But I can try to learn about it.
-Unfairlane's point sounds reasonable. I will find out what order 
I'm in. 
-Lewinski's advice is to learn more, then decide. Wise.
-George's work was for naught.
-I like the way Piazanno put it best. Go For it!!!

Correction -Millercarbon's point is something that can NOT be ignored.

George's work was for naught.

Only to those with no ears.

@pizzano may I ask which technology you used for about $300?

IMO there are many speakers with passive crossovers indeed but just a small amount of these are implemented right, that's why there is an aftermarket modding it. There are many challenges with passive (impedance changes, phase etc) that only experienced designers are able to make it work and this represents adding more elements in the signal path and with digital dsp advances, passives will fade eventually.

Answering directly to the OP @gadios, I will definitely experiment with active or active digital if budget allows it (and time too). In my specific case my speakers have passive crossovers but to my ears I like to think are well designed.

I am not an EE, or audio speaker or amplifier designer, just another guy who likes music reproduced in the best way possible.

Depending on the number of drivers you have (remember you'll need an amplifier channel for each one) you could look at one of the MiniDSP solutions. If you have three way speakers and are on a budget you could start by replacing the Mid / Bass crossover and leaving the Mid / High intact which would require a DSP with four outputs and four channels of amplification.