I guess if you want to pay 3x the price for an ECS machine, with no case or keyboard as standard, then minimig is the way to go 
An ECS machine won't interface properly with a modern TV, won't have as much RAM, will need adaptor to have an HD... And the ECS machine could die any moment. The ECS machine will need adaptor for a new Mouse/keyboard... Etc...
The OP doesn't need AGA as he is using AMOS

Seriously though, minimig is meant to be upgradable in the future isn't it? AGA etc. How far have they got with that?
That is the replay, apparently at A1200 level
