Bringing this thread up from a month or so of sitting down in the cob-webs.
In the past, I've owned a pair of Polk RTi8 speakers. I loved the cherry finish on the real wood veneer and felt like the speakers looked more expensive than they actually were. I thought I would spend a little time listening to them again to see if there would be a fit for them again in my house - for 2 channel listening.
In the lineup for listening were the Polk RTi8, RTi10, Sapphire ST1 and ST2. Here are my observations:
RTi8: I realized that the sound was one of the reasons why I sold them. A bit too bright. Music didn't sound too good on them - or, at least good enough for my ears to appreciate.
RTi10: I've heard that these speakers can miss out a bit when it comes to the mid-range capabilities. However, they were good sounding speakers. The didn't exhibit some of the brightness (or, rather not as bad) when copared to the RTi8.
ST2: To me, they sounded a bit un-natural. Some of the highs and mids were ephasized at different times. Seemed like they might be hard to spend longer listening sessions with.
ST1: Just like the Goldilocks and the three bears story, these were "just right". To my ears, the music didn't experience excessive highs or sound un-natural in any way. While they were the least costly of the bunch, I was impressed by the sound - and even more surprised by the price.
Unfortunately, the ST3s were not available, so I didn't have a chance to hear them.