Yeah I'm crossing my fingers on one of my 4 LCDs works. My first add-on I'm thinking is a PCMCIA network card at amikit. I think it's around $36. Would tracking down a subway USB make more sense? Oh and depending on the hard drive life one of those IDE to CF adaptors.
I have the wireless network card from amigakit and it really has worked well for me with miamiDX.
I have never tried the networking over USB, but I don't believe there are any wireless adapters. Just wired.
Subway is good, but it still runs off a port designed for a clock. So I think for best results you probably want both. I'm sure PCMCIA is less CPU overhead. Subway does bog down the system. IDE to CF is nice too

I went with a SSD but its actually slower than CF so I should switch back.