You can use most any 2.5" laptop drive as long as it's sata and 2TB or under. It should be 9mm in height. Some laptop drives are 12mm and those won't fit. You won't see much if any performance gain by using a 7200rpm drive. The PS3 comes default with a 5400rpm drive because it creates less heat than a 7200rpm drive. I put a WD Scorpio Blue drive in my PS3 a few years ago. I've had no problems with it.
Western Digital Scorpio Black 750GB 2.5" HDD for Laptops (WD7500BPKT) - NEW OEM this is the drive I am getting even at 7200 rpms it uses less power and throws less heat than most compatible drives..will be installing it tomorrow and will post my responces as to how it functions and ease of install..this I feel is best drive for upgrade and is only 10 bux more than the 500
Just go to a tech store and ask for a cheap 2.5" HDD for laptop. Take with you the HDD of the PS3 if you like. Then again it's just a common 2.5" HDD.
2 years ago I subscribed to PS Plus but I couldn't take advance of the free games stuff because my HDD was 20 GB so I went to a tech plaza and asked for the cheapest HDD they had, they gave me a 500 GB Toshiba HDD that works like a charm. Installing the HDD is also a joke.