One of my personal favourite is Korg Monopoly. Good filter, outstanding oscillator possibilites.
With the release of Midipoly retrofit kit, this synth become a serious sonic weapon and not just a vintage classic.
Addition to MIDI control over the keyboard, cutoff, pitch bend and portamento, the 4 oscillators can be triggered individually with MIDI velocity. The fun begins with the installation which is very easy.
Installation Manual
During the development I spent many hours with just sequencing and tweaking tunes on Monopoly like this
Home of Io, Minerva and Midipoly the Jupiter 4, Juno 60 and Monopoly MIDI retrofits
