A little update.
All good so far, a few little niggles, mostly default settings that I had set differently on my old PC.
All seems good and stable hardware wise, everything runs smoothly and the PC itself is blisteringly fast.
The (2 drive) NAS is up and running (with some help from a buddy) and I'm using it as I would a piggyback drive type thing, with any files/images backed up on both drives in the NAS itself.
The NAS has a lot more potetnial but it is serving my purposes as is, for now. I never wanted to get into clouds and the like when I bought it, I just wanted somewhere safe for my images, that was backed up automatically and also that I could work from and any changes would be duplicated. So for now, the NAS is doing exactly what I want it to do.
All my photos are now on the NAS, as well as a total of, wait for it, 3 other drives too, on my old PC, 1 internal and 2 external. Those drives (the older ones)will no longer be backed up to (but will still hold my images/files to date), I'll be relying on the NAS from now on, as well as an external drive I use for moving stuff about.
It all turned out well and money well spent, I'm suprised it went as well as it all did, I expected more problems but for the most part, it just works and I couldn't ask for more in that respect.
The ease of upgrading in the future isn't lost one me either, it should be far easier than trying to reserect my old PC, which I did consider. I'm far happier with the decision I made to build a new one though, it's night and day. I would definately do it again.
It's a massive leap from my old PC and the time I'm saving now is just mad, I have a life again.
You never know, I may even try some games.