Okay… Funny I have actuallly watched some of your YouTube video before… I didn’t put 2 and 2 together… Your profile image on OpenEnergyMonitor is slightly different. 
Thank for the great tips…
What do you think of the Samsung 8kW HT Quiet R32? Everyone is talking about Vaillant on YouTube as a high end option so I am a little interested to hear why you have gone with the Samsung?
One aspect that is SUPER important for me is the noise levels due to certain Danish requirements and the fact that we need to install ours on our boundary line.
I was planning on going with a Vaillant Arotherm Plus 7kw, but having had a look at some of Samsungs new offerings I can see that the HTQ might be an option. I would love to hear your thoughts.
I have a 7m insulated 40mm Pex pipe running from the boundary to the house underground (Uponor EcoFlex) and plan to then split break off to a 35mm Copper pipe and then down to 28mm as I have a 5m run to my indoor Underfloor Heating Manifolds.
I think I have also decided to drop the Newark HG cylinder as it doesn’t make a lot of sense thanks to @markocoheat input and explanation. However I would really like to hear which 300l cylinder people would recommend. I have previously looked at Vaillant’s UniStor 300L as well as the Gledhill Stainless Lite Plus Heat Pump
Love all the input you guys have provided the community… Keep up the great work! 