However, one does need to check the specs of said drives to make sure they can operated in single ended (8 bit SCSI-1) mode. This is more common with Ultra160 drives, but there are a number of U320 drives that retain backwards compatibility. The 2.5" Seagate Savvio drives * give you plenty of room in a 3.5" drive bay to also mount the adapter.
It also seems to be important that your adapter provides high-byte termination (termination resistors on the unused upper 8 bits of the 16 bit wide SCSI bus). There are a number of threads here discussing the use of these modern drives if you want to have a search and compare notes.
* be sure you are buying a SCSI version, not a Fibre Channel (FC) or Serial Attached SCSI (SAS) version.