RAID5 EIDE vs RAID5 SCSI

I submitted some specs for a server our school….it was a “wish list” and I specked the server to use RAID5 controller card. and 4 9 Gb SCSI drives. When the specks went to the committee to get approval. It was shot down by somone that said we should be thinking RAID5 EIDE….not SCSI…for we could buy an 80 GB EIDE drive probably for the same money for the 9 Gb SCSI. Needless to say when I heard what he said, i was upset. Does anyone have any experience with RAID5 EIDE? I thought all servers should be SCSI…..The DELL site i went to to configure the server didn’t even offer such a drive or any mention of RAID EIDE…