Sample #2 sounds most balanced in terms of volume and presence. In #1 and #3 the violins appear significantly more distant than viola and cello, and I hear the troublesome room.
I'd try to use #2 with some nice reverb tail added (feed the reverb pre-fader from spots).
If DIN and omnis are "completely out of phase" maybe one pair has inverted polarity outputs.
Microphones always make me sound louder and better! -- Guitar Girl