I use two Rode NT5 mics for live performance drum overheads and they are very good, they pick up all the cymbals and toms well, they are sensitive and have a wide spread of sound-source capture; I use them on choirs as well. On a guitar, one NT5 would tend to capture all of the sound at a distance of say 12 to 18 inches from the sound-hole. If using two NT5 mics put them together in an X position (i.e. cross them over) about 12 inches away from the guitar in line with the body where the neck joins it and point on towards the fretboard and the other towards the sound hole. What does also work well (for recording, not live) is to put something like a Shure SM57 pointed at the fretboard around the 15th fret area and about 6 inches away, then use one NT5 at about 18-24 inches away in line with where the sound-hole is (or would be on a Resonator!). Make sure that your mics don’t end up with out of phase sound in production, try flipping one or other of the signals when mixing to see if it improves or worsens the sound quality. In terms of EQ on your QU desk or in your DAW, add a bit more bass and mid to the NT5 signal source and keep the SM57 flat.
