If you are getting a plain 1200, I'd get:
PCMCIA-CF adapter and CF card (Amigakit easyflash or. .)
IDE-CF adapter an a 4G CF card.
Whdload key
Acceleration/RAM
PCMCIA Ethernet card
FF/SD for new monitor (Indi AGA mk2 or GBS82x0)
In that order...
desiv