Hi Brady,
I had the rf7 ii system with the center, mains and surrounds in 5.1 for about 4 years. Powered with an emotiva xpa5 200wpc amp.
I haven't heard the 7iiis, so keep that in mind, but in my experience, the 7iis towers had a glaring weakness in the midrange. For me, it was distractingly bad and they didn't at all match the center and surrounds. I tried a few different eqs and processors but I could never get it to sound good to my ears.
The pros of the 7's series is that, provided you have a good amp, your ears will give out before they run out of headroom. The towers have a ton of bass and can sound awesome for movies. My biggest issues were:
1. The horns can be unpleasantly shrill for my taste. Some people love that sound though, so take my opinion with a grain of salt on that
2. The drivers and the horn don't blend (especially in the towers). It sounds like 2 different speakers, and when most of the sound comes from the horn, it sounds super thin (especially for dialog). EQ boosting in the midrange just muddies it, as the 8 in driver doesn't work well in upper mids and the horn doesn't sounds great as it tries to reach down to the mids..
My experience was that for some music and movies, the RF 7s were a "holy crap" experience that was amazing. Then for a lot of other songs or movies, they sounded terrible. Songs with a lot of symbols were brutal.
I sold those 3 years ago and went with the Ascend Sierra 2 bookshelves and my center, mains and bought some cheaper ascends for the surrounds. I use a rythmik sub with these now. For me, this is a much better experience.
1. the sound is much clearer now. Mid range voices are clear and textured and the RAAL blends NEARLY perfectly with the 5.25 in driver. If you get the towers, that is even better since there is a dedicated midrange on them
2. Within reason, no matter how I EQ the ascends, the sound very good with all material. Instead of EQ'ing the RF7iis to fix the speaker issues (shrill highs, muffled mids), I'm just adjusting them to taste.
3. You lose some bass for sure, but can always ad more subs. I've found a good sealed sub blends really well and makes up for a lot of the loss of bass from the individual speaker. If you get the towers and horizon, that won't be as much of an issue anyway.
Anyway, just wanted to drop my two cents in. Hope this is helpful. The best solution is always to hear them for yourself and decide, but I know that isn't always practical.