I've had the NT5s for about 6 months - they cost about $600AUD, which, at the time, seemed a reasonable price - cheaper now of course - and I live in the country they're made in! Sheesh...
Anyway - I've been attempting to record fingerstyle
acoustic guitar (Maton CW80, so it's not a bad instrument) with them in various positions and am yet to nail a sound I can live with.
The review posted above said that he'd got the best results on acoustic with a single mic and some of the guitar pickup blended in - that's been my experience too to date - the highs, as mentioned in the review, aren't particularly bright, and I get a "honky" (as in horn, not as in po' white trash

) middy sort of sound that I just can't live with when I XY them.
I was experimenting further last night and discovered a position with one mic behind the fretboard at about the 7th fret and the other at the 'normal' 12th fret position, about 9 inches out. Bit hard to play that way though! I was only listening through headphones and I didn't record it so I can't confirm whether it was any good or not, but I'll have another play round tonight and record it and listen back properly, as it sounded a little less "honky" through the headphones.
Let you know what I find if you're interested. Can't help you with A/B comparisons unfortunately, they're my only SD condensers.
Cheers