Looking for NAS options. Synology, UGREEN, TerraMaster?

I think my Synology DS918+ may have bit the bullet, which is rather depressing since it was lightly used. But I'll know more once my third party power adapter arrives on Monday. If I need a replacement what do you guys recommend?

I only use my NAS to host my movie/TV Show library. Kodi for local, Plex for remote. If I get another Synology I shouldn't need to transfer everything from scratch, I can just migrate everything into the new NAS? Looking at the DS423+ or DS925+ but there seems to be drawbacks to both. The DS423+ seems to be more Plex friendly and is cheaper, but it supports less RAM than my DS918+ The DS925+ seems overpriced to me for what you get, but maybe you folks disagree.

I like the Synology software, but I definitely think the hardware should've lasted longer considering how little I used it. So maybe I'm better off going with another company and just transferring everything from scratch. It looks like I can buy better hardware for cheaper elsewhere. Do you guys recommend anything else like a UGREEN DXP4800 Plus or TerraMaster?