the easy answer is yes, any IDE drive will work. The ATA spec is supposed to be backwards compatible (there are some gotchas with this) any drive should be ok. The only concern that still seems to matter is with drives larger than 128Gig.. you'll need an ATA 133 controller to use all of a drive larger than that. Right now I have 4 Western Digital 80gig drives on my 867. (2 internal, 2 in firewire enclosures) that I am very happy with, but we have had a pretty high failure rate with the Maxtor 80's.
My Dual800 at work has 2x 72gb SCSI disks running in Raid 0. It works OK, but the problem with the other mac is that the current hard disk has some sort of non-repairable problem which no where can fix and they claim its not covered by waranty.
After the new one is installed I will send it away to be cleaned and hopefully it will fix it!