I've had the itch for awhile to upgrade from my Paradigm Studio-20 bookshelves. Reading this forum does not help!

This is for 2-ch music in the living room so being attractive is important as well as sonics. The Studio-20s sound nice but lack bass extension. I had been looking into adding a sub or replacing with towers. High on mylist were the Songtowers. However, since I have the monitor stands already, why not consider Salk bookshelves like the HT1?
I guess my question is ... would this be an upgrade in sound quality?
Spec-wise the HT1s go a bit lower than my Studio-20s (45Hz vs. 54Hz).
Would the mids and highs be better as well?
The HT1s sure look attractive in pics!

The price of the HT1s is higher than the SongTowers so, I am thinking there must be some sonic advantage.
Any advice or input is appreciated.
Thx,
Rob