I will probably get the new one when it hits. Although I don't use an 85mm any more my missus does, so will probably get it for her,
That old Siggy 85mm was a cracker prob my favourite 85mm, they used to call it the cream machine and with good reason, colours were fantastic from that lens as well although that was helped with the awesome colours from the D700 I used it with.
I used to have the 85GM and we now have the new Sigma and I don't know if it's because my editing style has changed or having had the G,M for so long but while the Sigma has faster a.f I am having issues editing files taken with it, colours seem really out of whack with my other lenses.
It is a pity the new G,M isn't f/1.2 as that may have tempted me back to using it myself.
The old Sigma 85 1.4 combined with the D700 was absolutely amazing to be fair.
The new DG DN definitely has different colours, also, LR vignette corrections are awful and you need to manually reduce the strength abit I find.

