bassstation was a good one, never used a ms404... specral audio neptune was my favorite rackmount monophonic synth, it's loosely like a mini moog with a few extra controls. have you considered the DSI Mopho? that's supposed to be good and real analog and a few sub oscillators to get below the feet.
the nord modular lets you assign every parameter to a midi controller or the synth and combine 25 controls to 1 knob (if you don't have the micro), so I'd definitely say there's a lot of possibilities that don't require you to be stuck in front of your computer.. aside from writing the patches.
don't know much about the Rave-o-lution, does have a terrible name.