Speaker orientation is not really relevant, what matters is tweeter being ear level if the speaker is not coaxial, if it's coaxial then doesn't really matter as there is no time alignment concern etc.
The NAD 3045 gets rather hot over long sessions so keep an eye on that as the internals are highly cramped together and there's a switching power supply in there too. the side panels slide out so you can take a peek at how it's all jammed in there. I think this heat cycle over the course of its in-warranty phase is what leads to the failures. Any hint of issues before warranty expires, knowing what I know now, I would be on the contact form to warranty repair to get it sorted, as said, every single D series model has had failures just outside of warranty.
The NAD 3045 gets rather hot over long sessions so keep an eye on that as the internals are highly cramped together and there's a switching power supply in there too. the side panels slide out so you can take a peek at how it's all jammed in there. I think this heat cycle over the course of its in-warranty phase is what leads to the failures. Any hint of issues before warranty expires, knowing what I know now, I would be on the contact form to warranty repair to get it sorted, as said, every single D series model has had failures just outside of warranty.