Picasso II or IV, SCSI controller or Buddha IDE controller, USB card, something that'll add fast ram, an accelerator (there was a recent re-run of 060 cards from GVP, you might find one for a not-insane price) and if you want to go with PC stuff, a 2386, bridgeboard etc.
CD-ROM whether added via usb or internally is of course a must.
A chip ram upgrade (2mb megachip if you can find it) should also be on your shopping list.
Softhut did have the TekMagic A2000 060/50MHz for $480. I think there was something funky with the SCSI-2 on that board, but I can't remeber the details. I would contact Joe before ordering
If you get a GFX card you may want to skip on the chip ram upgrade...
