NAS bying advise?

Hi there,
I 'am in the IT business for 40 years, but not very experienced in the network and NAS area. What I 'am looking for is an inexpensive NAS , no fancy feature, but reliable and capable to provide my core requirements.
1. Backup my 6 PC's data
2. Store hi-res audio files (flac) for replay with PC media player software JRiver via high-end sound card
3. Archive video files (HD only) from my DVR for replay when the internal disk gets full
4. RAID 1
5. Speed is always nice to have, but my network is only 1G with Cat5 cabling

I would be very happy if can recommend some NAS. QNAP sounds great overall, from SYNOLOGY I heard some bad things, but not sure whats true.

Kind regards,
Thorsten

Both Synology and Qnap are market leaders in NAS. Both have good and bad stories behind them. But regards to file compatibility, Synology supports more audio file formats without getting an extra driver or app. But if you use third-party apps like Plex, then both NAS will perform equally.Synology also has made it easier to backup your computers toa core level and their Drive app is really handy allowing you to keep some files on a server only but still show shortcuts on a computer.Dual bay multimedia friendly options would be DS218+/ DS718+ or on Qnap side TS-251D and TS-253D. Qnap would allow PCIe upgrades f you do decide to upgrade your 1GbE Ethernet.I hope this helps.