RCA connectors or 3.5 mm jack stereo line output?

I know you mean well, but that isn’t really the same thing as having a native RCA output!

Introducing a $0.98 connector is not going to improve sound quality. Think about what that connector is doing…simply taking what’s coming from the 3.5mm and splitting the channels to two connectors. That’s not going to improve anything.

The fewer connections the better, introducing something like that will just increase the chances of poor sound quality.