Western Digital 160 GB Scorpio PATA Mobile Internal Hard Drive WD1600VERTL (Blue)

This drive is quiet and fast. Here are pros and cons:
Pros: very quiet and fast.
Cons: kind of expensive compare to SATA drive.
I'm very satisfied with this purchase except that it took Amazon 1 week to start shipping.

This 160GB WD drive was an upgrade for my 4-yr old 80GB Fujitsu drive that was still working well, but too small. Upgrade was a pain -- not because of WD drive, but because Dell's piece-of-crap MediaDirect software got in the way, inexplicably truncating the larger 160GB drive down to 80GB. Can you believe it? I'll spare you the details, but had to dig deep to find a workaround on the TechHandbook website that allowed me to re-set the new drive to its full 160GB capacity and permanently disable MediaDirect (which I never used, anyway) so that it stopped getting in the way. (Dell's website was no help.) Used Acronis software to clone the old drive onto the new one. Beyond that adventure, the WD drive works great so far -- it is whisper quite, but not noticeably faster than my 4-yr old Fujitsu. Feels good to have some breathing room on my hard drive, and I hope it holds up as well as the problem-free old Fujitsu.

Great replacement or upgrade for PATA/IDE/EIDE drives in older laptops. Quiet and fast.

I've used these to upgrade drives and replace failing drives. HINT: buy/borrow an external drive enclosure, put the new drive in the enclosure, use Clonezilla ([...]) to copy the entire old drive's data (including multiple OS's, diagnostic partitions, etc) to the new drive, then replace the old drive with the new one and just boot up.