synology - running (2) of the 4 bay boxes, two different locations. zero problems, there are some 'gotchas' but not many.
you can torrent off them, stream off them, and securely access off-site, very well.
had the drobo for a decade, and it worked ok, but the interface left much to be desired.
synology is smooth, and has some great options depending on the size of your content.
i used the WD red drives at 6tb and am very content, fwiw
i have been able to complete end my spotify streaming service, thanks to this NAS, fwiw.