Hi Stephen, like Antony D, I moved from CDX2/XPS to NDX/XPS (also in 2014). My NAS is a Synology with WD Red HDD's. I also rip with dBpoweramp but although most purchases are downloads, dBpoweramp is an excellent metadata editor for these.
I have looked online and I only really need a NAS - 1TB or 2TB absolute max, more than plenty for what I will ever need. This must be a highly regarded solution if you went from a CDX2/XPS to a NDX/XPS or in my case a possible V1?