So if the plus model is not a good value you basicly say go with the qnap?
It seems in this case the plus version gives you Intel CPU so it's definitely good value unless the price goes up a lot. Historically the plus version has mainly given more memory so value might not have been as good.
I would not fully agree with the idea that a 2-disk NAS is a toy. It's the same thing with less disks, possibly less network sockets but how many of those will you actually use? Sure there are cases where a NAS with more disks is more appropriate (and I have a 4 disk at home right now) but the correct product really depends on what your use is.
I used to have a 2-disk NAS before, if I used RAID1 I could keep using the nas while one disk failed, however it was my home system and 24/7 uptime was not so important and I did not use raid at all, rather ensured I had proper backups to external disks, one of which was stored off site.
Now I have a 4 disk NAS with 3 disks in RAID 5 and one hot swap. If one disk failed the spare would automatically be taken into use and about 24 hours later I could survive losing another disk without even having to touch my backups. This is all fine, but at home I'm more worried about actually ensuring I will never lose my family pictures and neither of these will really make a huge difference in that regard.
If my NAS is broken I'll send it to be fixed and hope the drives still work when I get it back, but I can survive fine for days without it. If this was for a company then a broken device could mean several people not working or lost business and it would be a different case.
People have strong opinions but at the end of the day Qnap and Synology will both serve you well. I and my colleagues seem to have had less issues with Synology, but Qnap often offers more features which might be more important at home. Intel CPU's make quite a difference in NAS devices especially if you work with small files or have concurrent usage. Ensure you have sufficient disks for taking backups from the NAS of all important files.