why would I talk you out of a polysix? got two here and they sound great. Nasty filter? no way - prob needed calibrating or was battery damaged. It's a beautiful filter far more interesting than the DCO Roland stuff too.
When you get to know it, it has a far higher range of sounds than the Junos too. A tiny movement on the filter/knobs can make massive changes, unlike Junos where it's just one limited sweet spot.
Suggest you try one first and see for yourself, some people really love the P6 (I prefer it to my now gone juno 60/6)
V-SYNTH | JX-3P | AN1x | JD-800 | POLYSIX x2 | PERFORMER
HAD: SH101/JUNO 1,2,6,60/MKS70,50/JX8P/D50,70/JV1080/AX80/SY77,85/DX7,IID,S,100 /TG77,500/TX802,81Z/MS2k/DW8000/PROPHECY/WAVESTATION/M1/KSRACK/CZ1