Thank you for the detailed answer! I will have a look on the Denon and Marantz and save some money. In Europe 700€ difference between the X3800H and the Cinema 50
Sounds like Spain is an exception then, though I am using manufacturers list prices. Street prices, especially if on sale prices are used, the stories could be very different.
Following are again, based on list prices, I last checked months ago, the differences were less than 300 Euro, just checked again seems still the same. I believe in Germany and the UK, the differences were similar, around 200 to 300 €. In the USA and Canada, we have too pay 700 to 1,000 € for the Marantz.
With 9 channels of amplification, up to 4 independent subwoofers, Dolby Atmos and DTS:X, plus IMAX Enhanced and Auro-3D, the AVC-X3800H envelops larger living spaces in theatre-quality sound. Enjoy amazing 8K video quality and with HEOS® Built-in, wirelessly stream and share online music between...
www.denon.com
1.700,00 €
Equipped with the latest immersive audio formats, CINEMA 50 is equally ideal for a dedicated home theater space or multi-use living room. Its thoughtfully selected connectivity options, flexible speaker arrangement, and fine-tuning ability allow you to make CINEMA 50 your own.
www.marantz.com
2.000,00 €
Anyway, so it seems like in Spain where you are, the AVR-X3800H is a good deal.
Dirac Live does go on sale for around 30% off so that's another good reason to go with Denon, or Marantz. Even in full price, lots of people would pay for the Dirac Live options. Room correction has much more impact on sound quality, than the hardware itself, especially when you get the midrange level, Anthem, Arcam, NAD, Yamaha, Denon, Marantz all will sound very similar if the listeners do not know which one/brand they are listening to, in other words, when they are not under the "influence, bias, Placebo etc.", when no processing is in use, such as listening in direct, pure direct, straight mode etc.
Just take your time, do your research before spending the big dollars, and good luck in your search, and decision making process.