Tried posting and the thread moved
Keeping in mind what Drew mentioned about speed an HD 4:4:4...
£250.00 against £105.00...
Dive safe
DeanB
You can often save a couple of £ by making your own. For a drive or two not a big deal, but if you start getting many drives to save footage it can add up. You can get 500 Gig bare drives for about $100 or so, $750 Gig drives for $150 or so. For instance, Wiebetch makes a couple of options including a SilvaSata one bay option for $99 and you can get trays for $20. (The one bays do not have fans, but I have not had an issue with heat, I have 1 of these running 24/7 pretty much since 2006 and have two more that get constant use. Except for one external power supply brick which went bad, no issues.) So the initial outlay for that set-up, if you buy a bare drive, $230 or £115. If you buy an extra tray and another 500 Gig Drive that is another $120 or £60, instead of £105.00. Applies to the other options, they all have different points where they make sense. I also have the two-bay RAID 0/1 which runs with or without a computer. I will take one tray and have it rebuilt/backed up without really thinking about. The ones with fans are noiser.
http://www.wiebetech.com/products/silversata.php
I recently got the SeriTek 5-Bay enclosure http://www.firmtek.com/seritek/ (only using a software RAID right now with that one) after reading some good things about them and that they are quiet for a 5 Bay. So far the review is right - it is fairly quiet for a 5 Bay ( I have 5 1 Terrabyte Drives in it) and about the same noise level as my MacPro Tower, not bad at all and the quietest of any I have. It also has a Fan speed switch when you really need quiet. It is about $600 (you need to add drives). And you get the card in the package they offer. If you put 5 500 drives in there you are looking at around $1,100 (though you can start with one drive).