I tend to tape larger rock shows (low pro) so go with cards, but I'm attending a smaller seated acoustic show - about a 200 seater - where I expect a very quiet crowd. I'm about 10 rows back near the soundboard....I'm tempted to use my omni caps (sort of angled 'A-B' config.) rahter than the cards. I expect the PA to be fairly significant.
Anyway, I've never used the omnis before - do you think this would be an ideal situation for them rather than the cards?