+1Each of them has a purpose. Bristlenoses eat algae while corydoras are more substrate sifters (eating leftover food). It really depends what you want them. Id get a BN pleco and the 6 Sterbais.
Do you have any experience with angels eating pygmy corys? I have both adult angels and pygmies and I just don't see it happening. Maybe with a very small pygmy, but still, angels really aren't designed to eat a fish of any substantial size.+1
I love my BN's, I would reccomend getting them young. It's cool to watch them grow from tiny babies and to watch them bristle. Corys are cool though, but my favorites are pygmys. Pygmys will be eaten by your angel though...