I have had SongTower RT speakers for about nine years and am now considering an upgrade.  Can anyone who has made a similar upgrade comment on which speakers you upgraded to and how much of a difference it made?  I am looking at the Song3, Supercharged SongTower, Song3-A, and Veracity ST.  Some of these speakers are in a similar price range and it is not clear to me why I would pick one over the other. 
I had owned SongTowers with the standard dome tweeter for nine years, until last summer.  I ordered the Veracity STs.
They have an identical footprint to the SongTower, dig significantly deeper in bass (34 Hz vs. 40 Hz), produce a more detailed sound from the SEAS magnesium mid woofers instead of the SEAS paper/fiber drivers of the ST, and (for me) have the cleaner and smoother sounding RAAL ribbon tweeter instead of the Hiquophon ¾" dome.
At first, although I could easily hear a difference between the two, I thought it was a close call whether the Veracity ST was a major step up from the SongTower.  As I've listened to more and more music with them, my opinion has improved.  Now I think the Veracity ST is a major step up.
The Song3 was brand new at the time, and I didn't seriously consider them.  They have a larger footprint, and that was a problem in my room.  I decided I wanted to stay with a similar sized MTM speaker with transmission line bass.
All Veracity STs come with a full front veneer finish, no black panel.  I got undyed ropey cherry with solid cherry rounded over edges.  I never get tired of looking at them.  These photos were from last August when they were new.  Since then they have darkened to a warmer tone. 

