Hello,
I just went from R3 to R11meta’s. I listened to R3 Meta and also R5 Meta. The store did not have R7 Meta but from what I heard and what I know from owning R3 for several years, I went with the fulled soundstage the R11 produces as they have 4 bass drivers vs. 2. It seemed to me to spend the extra to go all in and the difference was very noticeable even to my kid who is not an audiophile but still has good ears. I use a Parasound Hint-6 integrated amp to drive mine at up to 160W. The R11’s states amps up to 300W.