So it's time to upgrade however due to budget constraints and the fact I need 2 for raid it will only be to 2TB drives.

Now comes the question of which disks to use. Currently I use 1TB Samsung HD103SJ drives and to be honest they've served me well in a 24/7 environment running for 3 years. 

So do I stick with Samsung @ £70 a pop http://www.amazon.co.uk/Seagate-Barracuda-inch-Internal-Drive/dp/B006H32Q3S/ref=sr_1_3?s=computers&ie=UTF8&qid=1384171245&sr=1-3&keywords=samsung+2tb

Go with cheaper Toshiba drives for £60 each http://www.amazon.co.uk/Toshiba-DT01ACA200-7200rpm-Internal-Drive/dp/B009CPDI62/ref=cm_cr_pr_product_top however i'm a little cautious as I haven't used Tosh drives much. 

Or for £77.96 each I can have the quality Western Digital "RED" drives http://www.amazon.co.uk/gp/product/B008JJLZ7G/ref=nosim but reading the reviews on amazon there seems to be an issue with warranty being 'out of region' which means they will not honour the warranty in the UK meaning you would only get the 1 year warranty from amazon and not the full 3 year WD one. It also appears the seller is shipping the 3 platter version instead of the 2 platter one which perform better with less noise.http://rml527.blogspot.ca/2010/10/hdd-platter-database-western-digital-35_9792.html

After some research and reading of reviews i've decided to stick with the samsungs and found them slightly cheaper here http://www.cclonline.com/product/72739/ST2000DM001/Hard-Drives/Seagate-Barracuda-7200-14-2TB-Hard-Drive-7200rpm-SATA-64MB-Internal-/HDD1317/