Try DIN. A tighter NOS... 90 degree angle, 20cm spacing between caps. I tried it at the Guster show I taped and liked it...
I'm not a huge fan of XY, although I am told my M300's like it best so I am going to experiment with it this weekend. I like a wider soundstage... DIN gave that to me, without rolling off the highs too much as ORTF can do with some mics.