Do the FE206's have a BSC circuit?I ask because my gut feeling is that if the overall system sensitivity is 93-95dB then I think the DX25 would be better. If it's 96-98dB then the MG27 would probably be better. It wouldn't be cost prohibitive to try them both and see. As far as cap value, that depends on what frequency you want to crossover. The DX25 allows a fairly low crossover point, so you can take advantage of that if you like.