Re: Polk R15s on sale again...
Sadly, there are no Polk speakers currently on sale at outpost.com. But just 'em a few minutes...
Actually, I couldn't even find the R30 Towers on the site at all. 
I have finally had the opportunity to spend some quality time with my new set-up: The R30 towers in front and R-15s in the rear. I have maintained the jensen center channel and powered subwoofer.
First. Jeremy: The dts Master & Commander is my all-time personal favorite demo track, too!
I spun up in the past few days: M&C, Eagles: Hell Freezes Over (dts) and Chronicles of Narnia: The Lion, the Witch and the Wardrobe (dts). It was my first time with Narnia (movie and DVD both).
The improvement from my current speakers to these new Polks is vast. Most of what I am experiencing I kinda nailed in my earlier posts. The sound is so much more full and rounded. There is so much more bass being pulled out throughout the room (rather than just from the subwoofer channel) and the clarity seems quite improved as well. The use of surrounds in the Narnia battlescene was quite active and I thoroughly enjoyed hearing the battle take place all around me with such life!
I actually purchased the Eagles disc (DVD-A format) just because I've read so many reviews about the sound quality. I was not disappointed. For a live disc, the recording and mix are quite good. What a lot of fun to crank up the Hotel California track!

I'm going to guess that John & Reginald and some of you others probably have quite a bit more of an investment in your system and speakers than I do. But considering my current circumstances, these budget-line Polks get a big thumbs up from me!

Thanks to you both and others for all the posts and advice.