Jkon, the Juno-G is a very nice machine. Compare it to Yamaha and Korg workstations under $1000 and you'll clearly see who is the winner. Also, the Juno has taken a lot from Fantom-X.
Juno-G sounds are very nice, very well programmed. This is a matter of taste, but I really like them. The performance mode is powerful, with up to 16 patches and 3 effects you can layer, split or distribute sounds on other keyboards. That's more than the Motif!

I had a Proteus Keys and an X5D but now I'm only using the Juno as synth, with the X5d as midi controller to play other parts on the Juno.
The XV Collection adds lots of "old" roland patches, the b4real emulator is really nice. All these things are true even for the Fantom.
So, which is the problem? The problem is that you say that you need a good quality keyboard, and the juno does not have it. Look, the action is not so bad... better than Yamaha MO6 or Triton LE, better than any <$1000 workstation I have tested. But it can't be compared with the Motif or Fantom (S or X) keyboard. These are instruments in another class.
What's more, the keys are a little bit shorter and smaller, and you should try it to see if it is a problem for you.
Keep in mind that the Xa also has a cheap keyboard (but the keys have regular size).
So, I think the Juno is good as a second synth, to play mostly synth (pads, leads, strings...) sounds, or for music production. Lots of wonderful analog-feel and '80s patches, many typical Roland sounds, but also good trance sounds.
Since you have a Motif, you could take the Juno as your second keyboard. Acoustic instruments (piano, acoustic guitars, brasses) on the Juno are not as good as in the motif or fan-x (unless you buy an srx expansion card...), but synths, electric pianos, leads etc are good.
But if you're concerned with build quality and keybaord quality, no matter which brand (be Roland, Yamaha or Korg), you should not get a cheap workstation (Juno, MO6, MM6...), but a used high-end workstation.
This is *my* opinion... of course you should try yourself.
Btw, the juno is not ugly... it is really nice!

I love it.