My Samsung HD204UI is giving up the ghost, so I'm looking for a 2TB or 3TB replacement. 3TB seems to be the best price point at the moment but if they're a lot noisier or less reliable than the 2TB drives, I'd probably go for the latter.
I've currently got a 2TB WD Green and a Samsung Evo 256GB SSD. The SSD holds my OS and the main games I play that need to stream a lot of data. The WD Green is a bit full at the moment, holding both my movies and music and my games that don't really need the speed of the SSD (not that there's any room left for them on that anyway).
What I intend to do is have my data, My Documents, etc that is regularly accessed on one drive, so that the other one, holding only infrequently accessed stuff can stay spundown most of the time to reduce the noise floor. I do plan to get another SSD sometime though, and I'll probably move my regularly used data to that then, so I'll want both HDDs to be spundown most of the time.
I was looking at the WD Red range but then I read that they're constantly spinning and can't be spundown, so whilst that might be OK at the moment for my regularly used drive, once I get the second SSD that will be a pain if true. So perhaps I should get another WD Green? However, I know they have an overly aggressive idle timeout and I used to have wdidle run at every boot to change this but that's not working for me now with Win8.1/my new Intel board, so unless I can get it to work from a DOS boot, that could be a problem.
These is my current shortlist (I'll obviously shop around for the best price once I've chosen one, these prices are just for rough comparison purposes):
Western Digital 3Tb WD30EZRX SATA 3 Caviar Green Hard Drive £78.36http://www.scan.co.uk/products/3tb-wd-wd30ezrx-caviar-green-sata-6gb-s-intellipower-64mb-cache-8ms-ncq
Samsung/Seagate ST2000LM003 2TB Spinpoint M9T 2.5" SATA III £83.04 (whilst there's a price premium for 2.5" compared to 3.5" drives, they do tend to be a lot quieter)http://www.scan.co.uk/products/2tb-samsung-st2000lm003-spinpoint-m9t-25-hard-drive-sata-6gb-s-5400rpm-12ms-oem-ps3-4-pc-mac-ready
Western Digital 3TB Red WD30EFRX Hard Drive for 24x7 for 1 to 8 Bay NAS Boxes £91.57http://www.scan.co.uk/products/3tb-wd-red-wd30efrx-24x7-sata-6gb-sec-64mb-cache-intellipower-8ms-ncq-oem-24x7-with-nasware-20
HGST H3IKNAS30003272SE 3TB Deskstar NAS 24x7 Use HDD 3.5" 7200rpm £99.22http://www.scan.co.uk/products/3tb-hgst-0s03661-deskstar-nas-24x7-use-35-hdd-sata-iii-6gb-s-7200rpm-64mb-cache-8ms-ncq