I couldn't justify the cost of one of the new dual drive 27" iMacs, so I compromised
and replaced the 1TB WD Caviar Black disk drive in my current iMac "Core 2 Duo" 3.06 27-inch (Late 2009) with a Mushkin Enhanced Callisto 240GB SSD from Amazon.com.
Overall, it was a pretty painless process. The ifixit guide was invaluable!
http://www.ifixit.com/Guide/Repair/Installing-iMac-Intel-27-Inch-Hard-Drive-Replacement/1634/1
Nice Xbench Disk Test scores:
Results 340.17
System Info
Xbench Version 1.3
System Version 10.6.4 (10F569)
Physical RAM 8192 MB
Model iMac10,1
Drive Type Mushkin MKNSSDCL240GB-DX
Disk Test 340.17
Sequential 204.37
Uncached Write 264.59 162.45 MB/sec [4K blocks]
Uncached Write 299.25 169.32 MB/sec [256K blocks]
Uncached Read 99.11 29.00 MB/sec [4K blocks]
Uncached Read 423.54 212.87 MB/sec [256K blocks]
Random 1013.72
Uncached Write 1346.71 142.56 MB/sec [4K blocks]
Uncached Write 500.74 160.31 MB/sec [256K blocks]
Uncached Read 3172.10 22.48 MB/sec [4K blocks]
Uncached Read 1122.29 208.25 MB/sec [256K blocks]
Overall, it was a pretty painless process. The ifixit guide was invaluable!
http://www.ifixit.com/Guide/Repair/Installing-iMac-Intel-27-Inch-Hard-Drive-Replacement/1634/1
Nice Xbench Disk Test scores:
Results 340.17
System Info
Xbench Version 1.3
System Version 10.6.4 (10F569)
Physical RAM 8192 MB
Model iMac10,1
Drive Type Mushkin MKNSSDCL240GB-DX
Disk Test 340.17
Sequential 204.37
Uncached Write 264.59 162.45 MB/sec [4K blocks]
Uncached Write 299.25 169.32 MB/sec [256K blocks]
Uncached Read 99.11 29.00 MB/sec [4K blocks]
Uncached Read 423.54 212.87 MB/sec [256K blocks]
Random 1013.72
Uncached Write 1346.71 142.56 MB/sec [4K blocks]
Uncached Write 500.74 160.31 MB/sec [256K blocks]
Uncached Read 3172.10 22.48 MB/sec [4K blocks]
Uncached Read 1122.29 208.25 MB/sec [256K blocks]