i own a P08 myself… and i know what you mean… its sounds warm, but i dont like the OSC with wide open filters… my modular sounds much better here… so the P08 is always more a backing filler and the sounds are not anymore “lead or main, but solid fill up”.
be careful with the P12. it has the old lowpass-filter and it sounded a bit too plastic for me… when i tested it, the pro2 with the new filter sounded much more amazing!!! and at least it has a) a cool sequencer, b) much better DCO sounds and filter … sounds much more “state of the art modulation” to me. for simple chords you can also play it somewhat polyphonic and the solo leads really blow away my mind
OB6 sounds great, but i think you will end up with better sounding filter and VCOs, but still with the same sound capabilities like an P08… so not a game changer for you.
Did you ever thought of a virus TI2?.. i am still thinking about this one… its sounds huge and has a wide range of sounds…
what i like most about DSI is the way you can play this instrument… the knobs, ranges, the keys… i feels like a grown up performance instrument… still you can get more crazy or special stuff with other synths :-))