Win98 or Win98SE Maxtor
Personally I'm a Maxtor Fan with no problems with any of the drives I have, I'm not saying that Maxtor is better than Western Digital, I'm saying if you've invested in 5 Maxtor drives and gotten excellent service from them, you tend to stick with whats working for you.
Details, Details, Its all in the Details, If you need help, Don't leave out the Details.