For those of you who have been able to experiment with different crossover slopes (12, 24, 48 db/octave, etc.), and types (L-R, Butterworth, Bessel, etc.), which have you found to perform the best in your systems? I currently am using 48 db/octave Linkwitz-Reilly, but I have been experimenting with others. They all sound different, and seem to have pluses and minuses. Anyone have any thoughts on this?