IndianRingNeck.com

I have a RB2 and IRN. neither of which sleep in a sleeper cage. Is this recommended. I cover them in the living room at around 7:00 PM and uncover them around 6:45 AM. Neither make any noise except when I first cover them I hear them grinding their beaks.

Beaks grinding is a good sign, it means they are comfortable and content. The question is, is there much noise in the living room after their bedtime? In this case it might be better for them to be in sleeper cages in a quiet room. Otherwise I don't think there's a need for that.
I have an IRN and a Cockatiel in the living room and I just cover their cages in the evening and try to keep it quiet. Everything's fine so far

I've never heard of sleeper cages!, why have Two cages to clean when one is more than adequate?, I've always covered the cage in the evening and uncovered next morning, my bird has a perch he loves to sleep on.