Good question. Please read the Polk forums for more in depth information, plenty of Threads there about that.
Speaking of Polk forum, No sooner I posted up my thoughts of those RTi-a5's here on AH to
@afterlife2 @vader540is I got hit up with a Email from Polkey Audio wanting a Survey of if I would recommend Polk Audio Speakers. Of course it was immediately trashed and website was blocked. #1. Polk Speakers, a dollar to dollar Value brand, BBS brand. Are there better in the Market? Most definitely, are Polk Audio Speakers a good Value at FRP? Big No. Would Polk Audio be my 1st choice for L/R main for music only again a "Big No". Nothing that Polk Audio has on the Market Now expect for maybe their new line flagships only because haven't Listen to them in person. Any of Polk Audio speakers that I have owned in the past and present couldn't hold a candle to "RBH Elite Towers" that Includes Polk Audio LSi-15 and LSi-25 flagship line. I have owned 15's heard the 25's. Polks LSi-15's are good but Not at FRP. Would I recommend Polk Audio big No again much better out their for your money. What Polk RTi-line, lacks "inner detail" plus throw in some what "Hot topend" what you get is a Value speaker. Now throw in that Polk Audio isn't owned by Matthew Polk and CS isn't what it use to be plus Polk Audio is just a "Badge" for some offshore company No I wouldn't recommend any speaker carrying the Polk "Badge". #2: Now you gotta few bucks you want something to throw in a setup to get by like the dude who picked up those old LSi-15's with the blown topend and no telling what else, sure jump on them. Even if I could pickup a New pair of Polk Audio LSi-15's today I wouldn't, even at the going away price of the Polks LSiMs are going for now I still wouldn't. Much better to be had even at throw aways street price.
Best on a "Budget" Find. RBH Impression Elite Tower's. with matching Center speaker. $1600.00 shipped free No Tax!
Highly Recommended! If you can still find these.