I plan to buy a solid, stable, trustworthy NAS, and considering the DS411 with 4 disks (to be used in raid 5).
The DS411 seems sufficient for my purposes, I'll be using it mainly for remote backups and large data storage, and don't really need fancy features.
Question: what harddisks should I pick? I'd like to use four disks of 2, 2.5, or 3 TB, in raid 5. I've read some scary reports of brand X or model Y (including well known brands and new models) not working properly in raid, or crashing prematurely due to extensive up & down spinning, etc. But I'm not sure what to look for. Price is not a major concern, I'd be happy to pay a bit more if that results in better stability.
Is one brand more suitable than another, are 3 TB disks typically more or less trustworth than 2 TB in this setup, and does 7200 vs 5400 rpm make any difference? (other than speed obviously, but the network/internet will be the bottleneck anyway, and overall stability is more important to me).