You're much better off buying a real Amiga A1200 and a TV which can use it.
You'll save lots of money for lots of extra goodies.
MiniMig v1.1 is overly expensive for what it is.
It will never be able to be an A1200 (it is stuck at ECS).
It is not 100% compatible (yet).
It only has 4Mbytes RAM.
Without the ARM module hard disk emulation is not great.
C-One was a great experiment 8 years ago. It is obsolete hardware these days and once again overpriced for it's capabilities.
FPGA Arcade looks interesting if it can get enough developers and get the price down.