And to add to the recomendations...
take a grain of salt w/all of this. try XY out. especialy when you are really close, like at stage lip or on stage. that is where XY sounds like reality most of all to me.
You will probably enjoy the bulk of your recordings done DIN or ORTF. But when you get a good xy tape, you might find it superior.
personaly, I love them at 90-110deg and between 17-23cm. anywhere in that range w/these mics is going to produce tapes (or bits) that dont suck, no matter where you are in the venue. They are ultimately forgiving in this setup. shitty rooms produce nice recordings.
You will learn to tailor it based on what the mics do or dont do well for your ear.
enjoy!