Originally Posted by Larry Read

The SM58 also tends to reject sound from outside its pattern which is dynamic hyper cardiod meaning that you must sing directly into it stright on.


Larry, the SM58 is a cardioid pattern, not hyper-cardioid.
The Beta 58 and Beta 87A are super-cardioid pattern mics.

Actually, the super-cardioid is probably going to reject more extraneous noise than a hyper-cardioid mic anyway because the rear area pickup size is larger on a hyper-cardioid pattern than a super-cardioid, though it's true the front pattern is tighter.

Also, don't forget that the Beta mics have a pretty strong low end bump if the mic is used in close proximity. That may be harder to learn to use effectively.