Akai VX-90

You have triangle, saw, square and saw plus triangle waveforms. You also can control pulsewidth, the filter with its own envelope and an LFO for modulation. There are triangle, square, ramp-up, ramp-down and random LFO wave forms. It has a good sounding analog resonant low pass filter as well as a high pass filter. You can get some great analog poly sounds out of this piece. While testing we ran a slow triangle waveform modulating the oscillators' pitch ever-so-slightly and got some lush sounds happening. The built in chorus has two settings and sounds good too.
On Ebay here.