It is still early stages.
Not really decided if really want to do this. It involves two high quality and identical power amps. Very expensive proposition.
What I currently use is a hi-end DIY effort with scan speak drivers. If I go ahead with this, It will be DIY but with a lot help from a DIY guru.
hi square_wave
have a look at this-
KSC Digmoda DDC520 Mono Two-Channel Plate Amplifier with Integral D-Pro DSP from Madisound
all you need to do is mount one of these on your existing speaker (two for two) and bypass the passive crossover.