I like the two figure-8's technique for recording myself playing guitar, and the proximity effect is a nice benefit. I typicaly use a stereo LD mic oriented horizontally with both caps switched to fig-8 mode. If you know the Blumlein technique, its that with the mic turned sideways. Sometimes I'll add a seperate SDC cardioid or supercard pointing at the neck joint of the guitar as well for 3 recorded channels (one voice, two guitar), which works really well but the 8's alone are fine. If the single stereo LD mic had the option of switchable supercard patterns, that would make it bit easier to position the mic in close and point both capsules appropriately, since then the nulls would be more like 120-degrees around from the front axis of the capsules instead of at 90-degrees, but my stereo LD doesn't have a switchable supercard pattern. With two seperate figure-8s you have more stands and wires, but more flexibilty in placing the mics.