Bowers and Wilkins 684's compaired to Polk Audio RTiA7's

I want to add a set of Bowers and Wilkins 684's or Polk Audio RTiA7's to my existing set up. See post

http://www.avsforum.com/t/781208/emotiva-thread-q-a-technical-talk-only/15150#post_22532361, page 506 post 15158

to understand my issue. These floor speakers would be the left and rights and the existing Polk Audio RM7000 to be the hi left and right. Any opinions on a comparison between the Bowers and Wilkins 684's or Polk Audio RTiA7's ? These are with in my budget.
Edited by FrankTR - 11/4/12 at 9:14am

I want to be able to listen to both side by side however one store close has B&W and other Polks.

What would make a good center to go with the RTiA7's? I went and listened to the 683 yesterday and they are great with a new center HTM 62

OK I pulled the plug and got two 683 in black ash. Now I just need my receiver( Okyno NR 709) back from repair and hook this up. Going to try to stay with my Polk RM7000 center and see it will work. My wife was totally against me spend the extra $ for the 683 so during the demo the room had 684 and 800 series the 683 were in a open area connected to a large TV. They brought the 683 into the listening room and with-in 10 seconds of a song my wife said buy them.
Edited by FrankTR - 11/5/12 at 2:30am

I have been using the 683's and a new marantz 7007 receiver. This is with my Polk center and some other surround speakers. The Polk center is an older RM7000. I found a B&W center HTM62 used and a LCM-600SC either one is affordable both used. Also found a used CM Center 2 for $900 used. That is more than I want to pay right now. So any ideas on the improvement I could expect with the HTM62 over the Polk RM7000 or is it really that much better to wait for the funds to get a CM Center 2???

The asking price or the HTC62 is $250 and the space I have is just enough for the HTC 62 but nothing larger. So I guess I could take my RM7000 to the local best buy and place it next to the HTC 62 and see if I can tell a difference. Again $250 is a good deal for a HC 62. After I really measured the CMC2 would never fit.

I really use the speakers 683 and sourronds for movies. I place the center speaker under my screen on a stand that I can use only while watching a movie ( Wife's Rules), and move it, to under the TV for just watching TV. The screen is centered in the room and the 683 are on either side of the screen. The TV is off to the left side and that is where I have limited space.. Maybe a stubid idea but get the better center channel and place it under the screen for movies and conect the center speaker wire to it each time. But is it really that much better than the HTC62 for movies, I mean it is almost 4X the price.