Based on a quick listen through a couple of computer speakers tacked onto an iMac (with no response below 100 Hz). I prefer the spaced omnis (#2) over the others. The mics in no.1 don't do the violins any favors. And to my ears, there is some lack of detail across the board in no.3. Maybe phase alignment or time delay, but after a couple of listens back and forth, no.2 always sounds "clearer".
Just tried again listening through some SRH940s and now I still like no.2 for the violin balance, but think the cello and bass sound better on no. 3. Relative to the low instruments, the violins sound more distant so the impression of a tight ensemble is changed. Maybe a little more spot on the violins or a little less on the bass?