Adding Wides to 7.2.4 Klipsch RP system

I have a 7.2.4 (7.1.4 via mini DSP) system driven by a 6700 Denon coupled with a JVC 950 projecting on 130 inch screen.

 The LCR speakers are powered with a Emotiva BasX A3 amp. All of the speakers in the system are Klipsch RP series (RP 260f, RP 440 C, RP 250 S) with two SVS 2000 PB subwoofers. I have used the mini DSP HD and REW to locate, equalize, align etc. etc. my system and run the Audyssey app to set up my system. The system rocks to my satisfaction.

At this point I run into the "if it isn't broke mess with it" guideline that a lot of audiophiles tend to ignore.

I want to add "Wides".

With the external amp running LCR, I can use the 6700 to power a 9.2.4 system. The layout of my home theater does create a gap between my bed speakers and my side surrounds that the "Wides" could help improve.

I could really use help and advice on two related issues.

1. Any advice/experience on the benefits of adding "Wides" to an existing 7.2.4 system.

2. I have got my hands on a set of Klipsch R-41M speakers that have the right size to be easily installed in the right location. These are not RP (Reference Premier) like the rest of my speakers. I also tend to use Neural-X when not playing Dolby Atmos material and would expect these Wides to be active in most situations. Would these speakers have a negative impact on the overall sound? Presently the Wife will not permit purchasing more compatible but expensive RP Klipsch speakers.

HELP