First post so here goes !!!
Samsung SpinPoint Enhanced M7 640GB 2.5 inch SATA II 8MB Cache, 5400RPM Internal Hard Drive - Sony Playstation PS3 Compatible (but can also be used to replace a laptop hard drive)
Bought this to replace my current 40GB PS3 hard drive because I was constanly deleting files so I could install new games.
Not brought from dabs.com before but they delivered promptly via DHL delivery service within 3 days.
Also available from Amazon directly (not a marketplace seller) for the same price (£42.99) but it states "Usually dispatched between 1 -2 months" which was too long a wait for me personally
NB: Can also get 2% Quidco/TopCashBack