Many speaker manufacturers give their various speaker lines fanciful names that make it difficult to determine a given speaker's position in the manufacturer's intended quality range. Polk, in contrast, simply places their speakers in three categories: Good, Better, and Best. I suspect this helps sales staff in stores enormously in communicating what the differences are between various speakers from Polk.
The new TSx range of Polk speakers fall into the manufacturer-designated Good category. The TSx500r, the larger speakers in the photo, has been improved in a number of ways from its predecessor, but the price is still a very reasonable $999/pair.