My response was to the OPs questions. You have a totally different set.
Your shooting is your business so you decide if a Python is worth your while or not.
I asked the question simply because the op asked:
"What I'm looking for is a good, accurate gun"
You responded with 1 word:
"Python"
Hence my question:
"Just how much more accurate do you think a python is over a 586/686 without having/testing a new python?"
No big deal, just wonder why you think a python would be more accurate than a 586/686.
Myself, I know nothing about the new pythons and my newest 686 is 2 years old so I can only use the 2 year old 686 as a hands on real world baseline to answer questions about accuracy.