[FiSheYe]

Well I wrote some stuff and didn't take time to put it in good words, nonetheless I think it makes sense.
His range should be greatly polarized and if he check-raises with a worse hand he is aware that it's not for value imho. I strongly disagree that this is a bluff in 5% of the time. With the given reads you provided it could be a bluff way more often than we all think.
On the other hand I doubt it's useful to play Villian if you perceive him as good and you've got no clue what his range could be.
There should be a softer spot on 25/50 and ego-smashing shouldn't be the main reason why you are sitting there.

Which assumption do you think the most unwarrant?
Please elaborate a little, I think most of my thoughts are valid even tho I just brain stormed disregarding lucidity and syntax.
I think it's kinda comprehensible his hand is 65(s) / 96(s) or a bluff (if we assume he is somewhat solid and straightforward from a "good 25/50 regular" standpoint).
I fold in this spot most of the time and no matter what you did, I really like his play.
Results please unless you are reopening the hand discussion.