Owning the 50HMz(?or is it 40MHz?) version of that card in my IIci, I say that it is wise to get the PSU Recapped.
I do not know how rare is the IIsi Adapter but I would figure that is quite rare. You will also need the software for it (a control panel & extension to turn it on/off and Apple's 040 Cache control panel, which came with it). It is best to turn off the 040 Cache off as there is a lot of older 68K Software that crash in using it.
As I remember correctly, you will need System 7.1 as a minimum for it, System 7.5.5 would be best. Thus you will need to max your RAM for the machine to handle that OS as well.
Since the adapter gives you a NuBUS Slot, you will need a "new" NuBUS Ethernet card for it. Your Asante PDS Ethernet card will no longer work with that adapter.
I do not know how rare is the IIsi Adapter but I would figure that is quite rare. You will also need the software for it (a control panel & extension to turn it on/off and Apple's 040 Cache control panel, which came with it). It is best to turn off the 040 Cache off as there is a lot of older 68K Software that crash in using it.
As I remember correctly, you will need System 7.1 as a minimum for it, System 7.5.5 would be best. Thus you will need to max your RAM for the machine to handle that OS as well.
Since the adapter gives you a NuBUS Slot, you will need a "new" NuBUS Ethernet card for it. Your Asante PDS Ethernet card will no longer work with that adapter.