Use the 2065. it can be shared on the pc side side. the A2386 can share almost everything. A diamond speedstar 64 isa video card( i think it was) will overclock the isa bus and speed everything also.finally ditch janus and look at SXSERV on aminet,its way better replacement.. .i think most old stuff was most compatible with a soundblaster.. been too long. this is all from memory when i was pushing a 386sx board to the limit long ago 
Oh worst case, ditch the ide card and use the sound cards scsi,that would free up a slot for the NIC .It would also give the possibility of 100Mbit.Use a realtek compatible card if poss.
good luck
Mech
Was about to offer some advice, but this guy clearly knows his stuff.
Therefore all that remains is for me to call you a jammy bastard for having such a premium setup.
Good day Sir.
