I have a fairly stuffed desktop A1200. Losing the portability and small form factor were not options. I think I built a nice stable system that is still practical. BTW, it's pretty easy to cram everything in there.
Specs:
A1200
Blizzard 1260/060-50MHz w/64Mb RAM
Blizzard SCSI IV w/64Mb RAM
ScanMagic Internal SD/FF
Hitachi 20GB ATA-6 2.5" HD
Amtrade HD Floppy
Bigfoot P/S
PCMCIA Ethernet
Good luck. I have a US keyboard/case if you like. But, I think shipping to the UK would kill any sort of deal.
Also, if you get an A1260, then try to get a SCSI IV. You can add more memory, and use an external SCSI CD-ROM freeing up your PCMCIA for a NIC.