Congrats! The Classic II was the first Mac I ever bought!

There's really no reason to put Open Transport on a Classic II. For one thing, OT runs horribly slow on a 68030, especially one with a 16-bit data path like the Classic II. Also, the only way to add Ethernet is with a SCSI to Ethernet adapter, and if memory serves, the extensions for those things worked only under classic networking, not OT.

Hope that helps!