Get the A500. Do the 1meg Chip ram Upgrade. make sure it's Rev 6a Mobo. but the ACA500 so you can have hdd on CF card and use WHDload. Also pick up a Cortex Floppy Emulator to install as the main drive. I can get you one ready to go for $35.
Deluxe Galaga works on ECS.
The 500 is much more durable. the 1200 cannot take much abuse. in fact, they're kinda fragile.
