how bout this one?

it is a Pine 2.5-inch 160GB SATA hard drives offer high-performance, low power consumption and cool operation, making them ideal for notebooks and other portable devices.

FEATURES:

• Fast and Efficient- With 5400 RPM spin speed and 12 ms access time, even the most demanding customer will appreciate the performance achieved by WD Scorpio drives.
  
• Quiet-In a notebook drive, silence is golden.
  
• Reliable and Rugged ShockGuard technology protects the drive mechanics and platter surfaces from shocks.
  
• Ideal for Portable digital devices of all kinds, including notebook computers, external storage, and digital media players.

$120 though

heres link: http://www.bestbuy.ca/catalog/proddetail.asp?logon=&langid=EN&sku_id=0926INGFS10097228&catid=20240#

I upgraded mine to 320gb using a western Digital

there is also this 2.5" hard drive

Seagate 160GB 2.5" Internal Hard Drive

This hard drive is built for mobility while preserving notebook battery life. Its large data cache and advanced features for outstanding performance. It also features a state-of-the-art 5400RPM ultra-quiet motor.

price is reasonable: $120

link: http://www.bestbuy.ca/catalog/proddetail.asp?logon=&langid=EN&sku_id=0926INGFS10100489&catid=20240

 nice, but i cant find any in retailers tho.

w.digital is the one i have.

i had a 40gig ps3, and needed a little extra space.

i found a new slealed w.digital 60gig hd sata, for £20 plus £1.50 delivery

fitted in seconds and workes superbly and is very very quite

http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2000150380%201309733643&name=320GB

try this

  I THINK I FINALLY FOUND MY HARDDRIVE!!!!!!!!!!!!!!!!!!!!

OK CHEK THIS OUT:

Western Digital OEM 500GB SATA Internal Hard Drive

The WD 500GB Caviar SE16 drive combines a 6 MB cache with a 3GB/s transfer rate for lightning-fast performance in demanding desktop and workstation applications. Technologically advanced acoustics minimize noise, and cool drive operation and enhanced reliability features help protect the drive and the data stored on it. It's the best way to keep your data safe. More Info:

More Information

FEATURES:

• Top performance for Windows Vista: WD Caviar SE16 SATA and EIDE drives are certified for Windows Vista and are top performers on the Windows Vista Experience Index.
  
• 16MB Cache: Bigger cache means faster performance. A massive 16 MB cache combined with advanced acoustic and power-reducing technologies make these ultra-fast drives the perfect solution for the fully loaded PC.
  
• IntelliSeek Calculates optimum seek speeds to lower power consumption, noise and vibration.
  
• SecurePark moves the recording heads off the disk surface during spin up, spin down and when the drive is off. This ensures the recording head never touches the disk surface resulting in improved long term reliability due to less head wear, and improved non- operational shock tolerance.
  
• Designed for use in the fastest PCs on the market, including high-performance business computers and multimedia or gaming systems.

BUT the only thing im not sure about is product size, is it 2.5"

I think this would be your best bet it is 320 gb and after the partions and installing the ps os it ill have about 264 gb left of free space. Also good company and free 3 day shipping for 109.99

http://www.newegg.com/Product/Product.aspx?Item=N82E16822136197

no it is 3.5 inches 

http://www.amazon.com/Western-Digital-WD5000KSRTL-Caviar-Drive/dp/B000FBSREK

and 

http://www.wdc.com/en/products/Products.asp?DriveID=301

is this the exact same one?

http://www.futureshop.ca/catalog/proddetail.asp?logon=&langid=EN&sku_id=0665000FS10105983&catid=

cuz its $109 as well, and futureshop is walkin distance, so i really dont have to wait 3 days to get it.