dilemma

[Akiko]

Well depends what you mainly want to use it for?

The A4000 is the best of the two machines.

Both Amiga's have AGA graphics capabilities but the 4000 has a faster processor and memory.

Also the 4000 has a standard Zorro busboard for graphics cards etc but can be expensive.

The 1200 doesn't have a Zorro busboard so you would need to acquire something like a mediator from elbox. www.elbox.com

[Akiko]

That  infinitiv tower case you mention should be compatible with the mediator 1200 busboard.

Also worth mentioning a basic 1200 only has a 020 14MHz processor, so you would also need to find atleast a 030 accelerator card to make it all work.

I think your best option is go for the 4000. It already has a decent enough processor and memory and ready for Zorro graphics cards and other expansions.

If you still want a mediator there is also a version available for the 4000D so you can still benefit from cheaper PCI graphics and sound cards etc.

http://www.elbox.com/products/mediator_pci_4000di.html