IMO the A6 is much better than it's price suggests. It's a shame it isn't a bit more well-known. If you do rule it out, don't do it on price alone.
Here's
a sample of a spaced pair and
a home-made clip (single A6 on flutes & guitar, recorded separately) to show it's the guitar that's zingy in the first, rather than the mic.
Some kind of stereo technique (spaced pair, XY, etc) is good for solo guitar or sparse mixes. Once you start adding a lot of other tracks into the mix, the subtle sense of space you get with a stereo mic technique tends to get lost.