User Manual Omega J4000 High Speed Pulp Ejection Juicer

I suppose you could use it for grinding them but you'd still need a press.

You could if you want bitter orange juice. It will definitely change the taste

Yes. I even juice leafy greens, I just twist it around celery

That's a subjective question; for what it's worth, I feel this juicer is quieter than any other I've used. But that doesn't mean it's quiet!

This is a solid build and good design - my second, the first lasted well over a decade. Don’t know the breville but would recommend this unit .