I've had some time to mess with them and I am very happy with the results! I moved my RP 140SA's off the towers and onto the wall where it touches the ceiling. This in itself improved separation of high and low sound fields while eliminating the noisy aspect of hearing audio that bounced off the ceiling and audio that is leaving the speaker at the same time, aimed away from the listener. Now it's a direct flow of sound from above and sounds much more obvious and clear.
Here is a comparison of my R25 Icon vs my new RP 504C.
The center channel no longer requires that the listener be right in front of it to hear crisp clean audio. One thing I noticed is that it handles the bass frequencies much better but this also causes the subwoofer crossover to sound a little syrup like. It's almost like double bass so I lowered the crossover on the subs from 120Hz to 100Hz. All of my speakers can handle down to 60Hz with ease and the crossover is set to 80Hz on the speakers so it doesn't need that upper transition anymore. To me anyway, it sounds much more natural this way and still has the headroom to transition to sub 60Hz levels naturally. I would have left it at 120Hz but I tend to push my dedicated sub levels higher than recommended for extra large floor shaking moments when the truly low frequencies are called upon and that boosted bass makes 100Hz-150Hz sound a little unnatural to my ear. It's possible that it's my sub placement but I feel that I have tried just about everything on my end regarding sub placement and I am experiencing the best I can given the room I'm in.
Audyssey used to round off the upper end for me but I stopped using it with these speakers. The bass sounds better with audyssey but the high pitched detail sounds dampened to the point where I turned it off and rounded off the upper range of the bass manually.
I experimented with 60Hz and 40Hz crossovers on my speakers and feel that it still sounds better with the EAX spec of 80Hz on the speakers and all speakers set to small. The only exception would be listening to music. I like to use stereo surround and with all 6 towers set to large with main + LFE. Music sounds great because all twelve 8 inch subs are firing at once in unison with my dedicated sub woofers. This doesn't sound good in movies though because similar to what I had going on with my center channel, double bass doesn't sound good to me when it's trying to replicate a real world environment instead of a studio recorded music track and unlike music, movies rarely use all 6 towers at once for the same effect so it's unlikely that the dual 8 inch subs will sound as good as the dedicated ones in most scenarios. I will say that I'm seeing a bit of movement on both 8 inch subs with an 80Hz crossover and they do put off much more power and lower range than my old R15 bookshelf speakers that had 5.25 woofers.
The larger horn on the tower speakers make the audio sound more 3D in my opinion and having the listening position surrounded by large tower speakers is a very large improvement in consistency and clarity compared to the book shelfs I used to use. Moving up from aluminum tweeters to titanium is probably the biggest improvement though overall. There are sounds I am hearing in the side and rear speakers that I have never heard before.
One thing that surprised me was that my amplifier dropped temperature a little when I started using these. I can only assume it's because they are less power consuming than my old ones. The T8 cooler I bought is saying that the amp stays under 86F at all times with eco mode disabled. As a musician, I have always been a fan of what Klipsch's horn technology brings to the table and I appreciate the intricacy of the bass guitar that these speakers can bring to life when set to large. Given the size of my room (18X14X10) and my budget, I don't think I could do much better than this. If I had a larger room I might buy bigger speakers and bi-amp them but for where I am at in life currently, this is very nice and all 11 channels sound natural, consistent, and high quality while being powered by a single AVR unit. Nice and neat.
In terms of how the speakers look. I think Klipsch are some of the best looking speakers out there. Though I didn't pay extra for walnut or piano finish because sound is most important and my budget is not limitless. Overall, I am very pleased and I will probably stick with this setup for a long time. Worth the money!