Emu XL-7 & MP-7 User's Group

I'm liking the sequencer on the PX-7 more and more as I get to know it
better.  I'm mainly using to drive software instruments though, I
haven't been using the sounds much.  I'm thinking of adding another
hardware midi sequencer to the mix just for variety.  Ideally
something a little different that would complement the PX-7.

Any favorites?  I don't care at all about onboard sounds, just midi
sequencing.  The Yamaha rm1x/rs7000 look interesting and, from what I
can glean from the manuals, are fairly different.  I've tried the
recent MPCs and I think the PX-7 is pretty much superior in every way
as a sequencer.  I've also tried the Elektron stuff which I found
overly simplistic as a midi sequencer and the Sequentix P3 which is
very powerful but too much of a head scratcher.