PSR are arranger, it has functions which you can play chord on left hand and it will play most part of the song. If you like better sound, I'd recommend going for higher end like PSR 1100, 2100 or 1500 and 3000 if you can afford. Sound quality is much better than other lower series. Used one could be the same price as Juno D.

Juno D is not arranger but it's a synth. It doesn't have the above function. However it's easier to tweak the sound using synth.
And synth looks better on stage than arranger. Anyway, IMO, it is a very low end of roland synth so you can't expect much. I also don't like the key feel of low-end roland.

I'd recommend you go for higher series PSR. Look for ones that has as many yamaha's Cool, Sweet voices. They sounds very good.