As we’ve seen above, there are many excellent ways to approach this kind of recording.
villeman, these ideas may not directly help your particular choir configuration but check it out for future uses. Here's an unorthodox version to recording choir / chorus'. (Part one)
I couldn't find any cool enough pictures so here's a drawing of my dual mic stand combo.
Depending on how large the choir or chorus is I like to add 1 or 2 of these combos per each section.
I usually ask the choir director to place his or her best singers by the mid boom mics.
The large boom mics pickup the entire section. I then blend each combo as per my ear. If applicable, the soloist would be miked individually. It gives me more choices during mix time especially when there are other loud sources near by.
When recording choirs, my first choice in mics are Milab VIP50s. I love the sound of those mics on choir. They work very well for me.
Audience mics play an important part in capturing additional room tone from the choir. I have used MKH416s, TLM103s, C414BULSs among others. It depends on what kind of room we're in and what we need to do to get around the sound system and such.