Hi Gary,
I found the Rodensotck CPLs giving the least colour fringing, if any. Not the cheapest but the best I have tried. The second best was surprisingly the Corkins, but that requires a filter holder and casts unwanted shadows cos of the entire contraption (u would know)
The PC-E is extremely enticing, as seen from the results u are getting !
Have also succumbed to tempation and gone with the D800E, after ofloading my D600 and D4 ! Indeed a heavenly resolving machine !
Thanks for sharing your tips. Very much looking forward to your write up !