Both should be fine. Hitachi is essentially IBM...they sold off their HD business to Hitachi awhile back. As for ATA-5 or ATA-6, it makes no difference in actual speed, even @ 7200 RPM spindle speeds. If I had to choose between those, I would probably go Hitachi as their desktop ATA drives are among the fastest, so their notebook drives should be good. Fujitsu has been around for awhile too though, and they both have FDB's and a 3 year warranty, so you really can't go wrong with either.
As for install, I'm working on a Dell lappy right now, and in most of them, you usually need to take out a small screw, slide out the drive in it's tray, unscrew four more little screws holding the drive to the tray, and remove the drive. Install is the reverse...just pop it back i nthe tray, screw it down, slide it back in, and you are done.
🙂
Edit:
It appears there are 7200RPM notebook models now, I wasn't aware as I really don't follow laptop tech as much, not having one myself. I mainly just work on them from time to time..
🙂