I ignored your tip and went for the 6, mainly for cost/size reasons (£399 on Amazon which is nuts for the spec). I've already found myself running out of voices when messing about trying to push it but I don't think I'll miss them too much when I start using it properly.
What a machine though, deep is such an apt description. I've just been going through the presets so far and trying to break down how they work and there's so much to consider. I can't wait to spend some quality time with it over Christmas.