I am sure he meant the Monitor Audio Silver and KEF R series, because you have already told us
The thing is, those Klipsch RF82ii and RC62ii have much higher sensitivity specs than the MA Silver and KEF Rs. Depending on the model you choose, they may need 5 to 10X more power than the Klipsch speakers need to give you the same sound pressure level, but it may still not be a problem if you sit close enough to them in a not too large room and/or you don't listen to cinema loud spl. The bottom line is, without the information the linked calculator needs, no one can give you a definitive answer.
Thanks again to everyone for their input. I just want to circle back around on this because I want to make sure I am not doing a disservice to myself here. My amp needs to be upgraded because I can not stream 4k from my blu ray through the 5200.
I unfortunately can't give exact dimensions on the room, because I soon will be buying a new house (also why I need to upgrade ASAP because once the new mortgage kicks in, all audio bets are off). If I had to give a rough estimate of the room size it would be 12x25x8. The seating positions will be roughly 8 feet from the speakers. The rears will sit at 10 feet or so from the screen.
I'm attaching some photos, sorry for the blurriness of them as they are screen shots from a video I took when we did a walkthrough of the house we are looking at buying. As you can see, the room is split by the beams. Couch will sit in front of the beams that split the area, with the TV and speakers against the long wall in the first photo. So the space behind the rear speakers is roughly the same as the space where the HT will be.
I now have SVS Ultra Towers (en route), SVS Ultra Center, SVS Ultra Bookshelves, SVS SB 12NSD, with the plan to upgrade the sub, possibly 2 subs, and either add another set of bookshelves or bipole for either 7.1 or 7.2, and 2 SVS Prime elevation (if I find it is easy to install in this ceiling).
So the question is, how do we feel about the Marantz SR7012 to power this system? I currently do not listen to super loud levels as I have young kids and my current setup is in our living room in a small home. On my 5200 our listening level is 45-50 out of 100, with no Audessey correction ran or any dB levels changed(I have had to hard restart the amp so many times from Bluetooth/internet radio freezing that I got fed up with running Audessey). It is as if I opened the box and plugged the speakers into the amp and just watched from there. Going forward when watching movies I expect to have it at a much louder level depending on the movie. I wouldn't say cinema level but I can't say for sure. I'm considering the 7012 because it is on a serious discount, and if I spend the 875 for that rather than 1500 from the x6500, I could have an extra 625 to put towards subs (sell the NSD get 2 PB1000 or 2000).
So long story short, 7012 yay or nay?
Thanks again for all your help and for reading this long winded post.