Thanks for all the advise!!!
I did the recording on saturday, but haven´t listened to the recording since. I opted for a standard X-Y config and it sounded great during recording.
It did sound a bit narrow though, but I didn´t have the time to experiment with different settings. I´ll try something different next time.
BTW. The church was quite small and the reverb was a bit short. What would you consider adding to a choir recording. Simulated church verb or something else?