I still would like to see JJ in that starting lineup alongside Horford. I think he provides just as much potential offense as Amir with more floor spacing and more versatile defense out on the perimeter.
That's not a bad option either. I am probably alone with this next opinion, but I think Kelly has a chance to earn a starting spot as well.
Oh yeah, it's going to be interesting in training camp, because all three of those guys have legitimate cases to be the starting 4.
Either way, even if we don't add anything else, we're in a pretty good position moving forward just by the addition of Horford.