I've done quite a bit of recording in large, reverberant churches and chapels, using my in-ear binaurals (Sound Professionals SP-TFB-2). My tactic is to sit up towards the front, but about 5-8 rows back, and preferably as close as possible to the center aisle. I've been very happy with the results. I run them directly in to my LS-10's mic input, and I've never needed to apply any bass boost even with pipe organ. At one place I had to filter out a mysterious 30 Hz rumble, though - probably related to the heating system. Since that was an a cappella chorus, the filtering didn't take away anything needed.
A tip for SP-TFB-2 users: Always use the windscreens. In my experience, they almost completely eliminate eardrum-induced clicks and pops (at the very worst, noises from nearby audience members flipping pages are more apparent). The golden rule: YOU should keep quiet and reasonably still when going this route.
At one performance, I saw the group's own recording rig - they were using a single-point mic (probably an AT822 or similar), high up on a light stand next to a pew, about 20 feet from the chorus. I don't know what sort of processing they do (if I were using an X/Y setup, I'd convert it to M/S and tinker with the imaging in post).