I use an sq-80 for a sequencer. It's good for riff based stuff, so you are not alone. I also have opcode studiovision4, but it is a logistical mess to deal with.

I use a Matrix6, JX-3p and Dw-8000.
If you can find a matrix6, snap it up, as it has lots of control, not to mention an end-of-world unison mode(you have to do some tricks to get it to detune all the oscillators, but well worth it), and good old curtis filters.

The JX-3p is execellent, though no unison mode, and if you want to get more resonance, you have to pop it open and turn up the res pots.

The dw8000..my first synth. best chip-based filter I have ever heard in a synth. as close to a moog sound as most poor folks get to touch. Mine is somewhat modified with a clock out and vcf in, as to increase usefulness. the unison mode is pretty good, and the voices rotate, which is important.