Which AV Receiver?

Thanks.

Is it worth going for the new Denon AVR-X2600H. I’m UK based by the way. I can get this one for £499.

Is this powerful enough for my Klipsch towers? Or should I look at a higher end receiver?

Thanks for your advice roberjerman. 
I will leave the center speak and rears for now and set up the towers and sub with the X2600H.

When I’m ready I’ll do the rears instead of the center. Or is it worth adding both? And yes, will probably get RP series.

Out of curiosity, what will 2x, 3x, 4x get me on the AV receiver?

millercarbon thanks for your input and for tipping the scales the other way and getting me thinking. To be fair to auxinput he helped me setup at my parents place and convinced me to go the integrated preamp/DAC option over AV receiver for my Yamaha studio monitors which are being used for similar scenario as what I’m after now for my own house. 
You made a lot of sense with the quality vs quantity. I am definitely only concerned with quality. If I have to ditch rears and center than so be it. I already have the sub though. Having good sound for movies will benefit my wife and I but having quality sound for music is what I really want (personally). 
So taking into consideration my budget, are you able to recommend some preamp and amp models which I can look into that will bring out the absolute best of my speakers (for my budget)?
Over here in the U.K. where I am it’s difficult finding somewhere which stocks a lot of kit in store for me to listen to so would appreciate the recommendations here. 

Thanks roberjerman.

I am trying not to ask but I’ve just read about the A12 and I’m a little confused.

What does it mean by integrated?
Is there a preamp and DAC built into this amp?
Is 60 watts per channel enough power? Is this suitable to handle/power the RP-8000F towers at 8 ohms?

Are there any downsides to an integrated amp? Applying what millercarbon said above would suggest that there would be reduced quality?

Good memory auxinput, I know you post a lot so that’s very impressive.
Yes that is at my parents place. I am
happy with the setup so thanks again. Just out of curiosity: I’ve removed the sub (Klipsch R-12SW) and that’s going to be used for my setup we are now discussing. So at my parents place is just the Yamaha’s. What would it take to add a center speaker to their setup? Would I need to add in an amp? Or is it better for them to get an AV receiver?

So for my setup, thanks for taking the time to explain what an integrated amp is. Is there no possibility of going this route but allowing for a center in the future? 
As for the Rotel A12’s, should I not be looking for something with more power per channel? What do I need for those Klipsch towers to bring out the best in them? I know you said that 60 watts is sufficient enough but I guess if I’m gonna spend I want to do it right and go for the best I can. Is there any other options which you could recommend?

Thanks kren0006 for your input on Marantz. I was looking at the Marantz SR7011 but only the Klipsch forum was advised to get the NAD T 758 V3.

Are you familiar with each? Could you comment on the differences in sound quality, features, specs?

You mentioned Heos being better than Playfi. Do you know what NAD uses?

The way you describe the sonics of the Marantz over the Integra is exactly what I’m looking for. I’m hoping you know about this NAD to be able to comment on the comparison.

Thanks kren0006, really appreciate you taking the time to give your input. 
That forum is quite interesting, they talk about Dirac being better than Audyssey  I’m in a Klipsch forum too and few have spoken highly of the NAD over the Marantz too. 
After what you said about NAD’s, I am concerned about the potential for the 758 to sound too bright as this is definitely not what I want. I’m not able to test this out in any shop, so without finding someone who has heard the 758 it’s a bit of a risk right?
The amp in the 758 is a class AB for certain? And this does not produce a bright sound?

Having BluOS is definitely a plus by the sounds of it. You mentioned the DAC in the 758 is old, but do you know if it is mid level?

You mention that the NAD and the Marantz are old, is there a newer better model of each?