I wanted to take a few moments to offer my impressions the new Polk RTi10s. I'll also discuss how these speakers compare to the RTi8s. I just used my Circuit City upgrade to move from the RTi8s to the RTi10s. I have been using RTi8s since October 2003, and I want to say up front that I think the RTi8 is a fine speaker that, when combined with a good subwoofer, can provide a solid HT experience. Having said that, the RTi10s offer a superior listening experience to the RTi8s. The two speakers have several physical differences. The 8s have two mid-range 6 1/2" drivers whereas the 10s have only one. The 10s, however, have two 7" woofers that the 8s lack altogether. Also, the 10s have a more pronounced bass venting system (Polk calls it Power Port Plus). The tweeters on the 10s and 8s are the same. First, let me address the high sounds produced by the tweeters on both the 8s and 10s. I find the highs produced by the Polk’s 1" silk dome tweeters to be sharp and clean. I felt no fatigue from the highs of either speaker. Next, I’ll address the mid-range sounds. I've been listening to the new 10s for two days, and, to my ears, I can't identify a difference in the mid-range sound produced by the 10s' single mid-range driver and the 8s two drivers. The 10s mid-ranges seem pronounced and unforced. The 10s midrange sounds seem as crisp and clean as those produced by the 8s. Now, let me speak to my impressions of the bass from these speakers. Bass is the area where the 10s truly shine. Bass with the 10s is full and more pronounced than with the 8s. You can hear and feel the accurate, large bass produced by these speakers. To get full bass response with the 8s, you have to supplement them with a good subwoofer. I can only speak from my personal experience with this, but there is a clear difference between using the RTi8s set to "small" and supplemented with a subwoofer and using the RTi10s set to "large" (given the 8s lack of a woofer, setting them to "large" really isn't an option). Being able to fire all of the bass to the 10s brings the bass in-the-room and in-your-face in a pronounced and accurate way that the speaker/subwoofer combo doesn’t (at least a subwoofer in the price range of the $499 HSU VFT-2 subwoofer that I own – a higher-end subwoofer might offer a different experience). I do want to add here that I am running 10s with a 225 wpc NAD amplifier. I am sure that the two 7" woofers on the 10s require some juice, I don't know if my very positive experience with the 10s would be the same with a system powered by a weaker amplifier. Also, I am using these speakers in a room that is approximately 14' x 14'. The two woofers on the 10s are perfect for a room this size or slightly larger. ______________________ Fronts: Polk RTi10 Center: Polk CSi5 Back Surround: Polk CSi3 L/R Surround: Polk RTi6 Subwoofer: HSU VFT-2 Receiver: Marantz SR7300 Amp: NAD 218 THX (225 wpc to fronts) DVD/CD/SACD/A-DVD Player: Marantz DV-8300 Turntable: Rega P3 Sony Wega 40"