Sell the A1200 Tower, but as countzero says keep the scandoubler.
And add the Blizzard030, PCMCIA Ethernet and Buffered IDE if it's an Idefix Express to your Desktop A1200. If you own many scsi devices you could keep your SquirrelSCSI.
You should add the Picasso II to your A4000, at least until you get a better gfx card.