notturtle
Well-known
"I do not get excited about 75 APOs, 90 APOs etc as I know they would be paperweights for me."
Any lens can be a paper weight if unused. Sometimes I leave the house with just the 90AA on my M7. I love these lenses but the trick is you must use them.
The point I was making was that the OP states that he is not a user of 85mm, preferring longer FLs in the tele range... and that the attraction was the stellar MTFs. That sounds like a terrible reason to buy a $3k lens! Its hard to succeed if you force yourself to use a great lens because it is great. Far better to leave the house with a FL that works for you, even if the performance is mediocre. You'll get far better shots.
I sold my 50 Lux asph BP (got it in a kit) because the FL is not one that works for me terribly well and when it does it tends not to be wide open, so I stuck with the vastly cheaper and already superb 50 planar ZM for well under 5% of my shooting. I would have been daft to keep the BP lux just because 'it is an amazing lens.' Each to their own of course, but I cannot fathom buying a lens in a FL that does not otherwise attract you just because it is super sharp. Truth is that 95% of the time a much mor modest lens would perform just as well (to all intents and purposes).
In response to the OP, I would go buy a cheaper lens like a used 90 APO Lanthar or Elmarit-M and see if you get on with the FL. If you feel the need to upgrade, go for it.