Anyone else bi-amping?

I updated my setup to bi-amp last year.  I was wondering if any others
in the group is doing this now and what your set up and experiences
were?

I'm using a dbx 223 crossover usually at 700hz.  I play around with it
a bit but keep it between 500 and 1k.  The lower end I'm running to an
adcom 555 connected to 4 ten inch moderately priced woofers in closed
cabinets, two woofers to a side wired in parallel.  The high side I
have going to an adcom 535 with a pair of 5 1/4 midwoofers and one
ribbon tweeter on each side also in closed cabinets.  The passive
crossover on the high side is just a simple 6db centered at 5k.  Of
course it is subjective, but I feel like moving the bass out of the
rest of the signal improved overall clarity.  The two adcoms, when I
experimented with them independently also seemed better suited to the
separate tasks.  Besides the obvious power difference the 535 seemed
to have a better sound at mid and highs than the 555 when listening to
them with a full signal range at about the same sound levels.  Of
course the 555 is obviously the choice for the low end anyway due to
the power difference.

For a signal source I'm using a technics sh-ac500d as a preamp and
either xm radio or itunes acc ripped at 256k via a squeezebox.  The
setup doubles as part of my surround sound as well hence the ac500d.
I mostly listen to old and new rock but occasionally anything else as
well, except country.  I'd like to take some measurements as well.
I've got a signal generator and a scope but don't have a good high
quality mic.

As I suspect most of us are, I'm trying to decide what to change next
as well :-)