That's opinion which I leave to others.
Just one FYI. NT 4 boot partitions are limited to 4 or 8GB depending on "factors". I suggest that if this is a boot drive, you reveiw those limitations.
In closing, such a drive may or may not be any faster than a sub 99 buck IDE drive if you just need storage. Some SCSI fanatics will write otherwise, but when I needed space on such an old machine, I just added a nice 7200 RPM IDE and moved on. The other guy was still sorting their system out...
I've got my eye on the Cheetah 36GB, curious as to an opinion on the subject of 10K vs. 15K, pros/cons.