We at Bare Feats Lab have done some testing with three brands of 1TB and 750GB 3G SATA drives. I found the Western Digital WD7500AAKS 750G to be the fastest doing small random reads and writes. It's also very quiet. I've been recommending (and using it) as my primary Mac Pro boot drive and I'm very satisfied.
For large block sustained read/write, the Seagate Barracuda 7200.11 1TB drive took the honors (101/100MB/s). Storage Review measured max read speed at 104MB/s. Tom's Hardware measured it at 100MB/s read/write. The Western Digital WD7500AAKS came in second at 98/97MB/s in our large read/write sustained tests, 97MB/s in Storage Review's max read test, and 94MB/s read/write in Tom Hardware's test.
Max large block sustained read/write speed should be considered when choosing a drive a RAID 0 set that you might use for capturing/playback of HD video or HQ audio.
I haven't tested the Samsung Spinpoint F1 but Tom's Hardware rated it at 119MB/s max read rate and 117MB/s max write rate. Wow! That would make it the obvious choice for use in a RAID 0 set. See:
http://www.tomshardware.com/2007/11/21/samsung_overtakes_with_a_bang/page9.html
For small random transfer performance, I refer you to Tom Hardware's "operations per second graph" where the Samsung F1 came in second to the WD7500AAKS in the I/O Meter Database test. I interpret that to mean it would make a faster boot drive than the Hitachi and Seagate but slower than the WD:
http://www.tomshardware.com/2007/11/21/samsung_overtakes_with_a_bang/page7.html#io_performance
One more thing. If you are a Photoshop phreak, the ultimate SATA scratch disk is a 10K 150GB Raptor in single or RAID 0 config. If cost is no object, the next step would be a SAS RAID adapter from Apple and two or three 15K SAS drives in a RAID 0 set. But I would go that route only after processing my large photos with a 32GB of RAM config to see if I even have scratch disk hits.