HPT-370 on my rig runs like a rocket. I get almost 23000, so says SiSoft Sandra, on my WD 7200/ATA 100 HDDs.
There is one issue. If your HDDs have Maxtor's or Western Digital's formatting utilities on them, you probably won't get the '370 to work. I had transplanted my HDDs and could not get them in operation until I removed WD's EZ Drive. Once I removed EZ Drive, the WDs blazed away without a hitch.
I have no opinion on other ATA 100 controllers.