I own a pair of SongTowers,
read my listening impressions, and I recommend them over any of the Polk towers I've heard, although I have not heard the ones you have.
As a follow up to what was said about the Salk SongTowers…
Power requirements The OP mentioned how his Denon 3808 doesn't provide enough power for his Polks. I have heard SongTowers driven very nicely by numerous different amps, from a tube 35 wpc amp to a 200 wpc solid state amp. I have no doubts that the Denon 3808 would drive them very well. When I first received my SongTowers, I used a 70 wpc Denon receiver, without any problems. They handle high power well, but do not require it to sound good.
Placement The SongTowers, in my experience are very forgiving speakers when it comes to room location. In particular, they do very well when placed directly up against a wall. I have tried a direct comparison between 2 feet out from the wall and less than 8" from the wall. The imaging and bass response do not change significantly. This conflicts with conventional wisdom about speaker placement, but I know other SongTower owners, as well as the designer, who all confirm these same observations.
Read this post, and the various responses that follow. Read this post and the various responses that follow. Note, Dennis Murphy designed the SongTowers, as well as several other Salk models.
These speakers also have very wide dispersion of the mid and upper frequencies, creating a very wide sweet spot for listening. It would be better to say sweet zone than sweet spot - it is that wide

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The SongTowers, with a standard veneer finish, now cost $1800, and $1700 in black paint. That's a bit higher than your $1600 budget, but I think they are well worth it.
Salk is an ID seller, but if you contact Jim Salk by email, see his website, he can locate some of his customers in the Houston area who might let you hear their speakers.