This is just my opinion, but the best bang for your buck for an overall gun is the devilbiss prolite. I do think the best of all of them as far as a clear gun is the LPH400, but the prolite isnt far behind IMO, and I'm sure the more I play with it I will get my adjustments down on it.
I have never sprayed with a newer sata so I cannot comment on that, all of the pics I see on facecrap and instagram indicates that it lays out a really nice finish(in the right hands)
Bottom line is, be it a higher level Devilbiss(tekna or prolite), iwata or sata youll be all set and you just have to get your gun adjustments down.
The prolite with the TE20 cap lays out metallics far better than my copper with the 7e7 cap. The copper will lay out some clear, but you have to crank it up!
Again, just my $.02