I think your 'no reads' policy fires back here, there is generally 2 types of players you can be against here.
'Louse fishy' who can have as little as
, and you are ahead of his range, in this case I like bet turn (333) - push river line.
'Reasonable' (good TAG, LAG) and then it gets much tougher, I would even think about a flop call here.
As played against this type I would check turn behind and would consider folding to a good sized river bet, I just can't see many hands in his range that we are ahead of. There is a small chance that he has JJ or
Q, but you are behind most of his range.
If it were your first hand at the table (and somehow you had a double stack) I would be more inclined to a 2nd scenario, from what I see most players at 600NL are reasonable.