Looks like he wants to learn one.
I hope you know that no standalone will match OEM in integratedness and comfort etc. All the cars you mentioned can be tuned properly on stock ecus. The MPI ecus are one thing and MED is another but its not like going to Andromeda, it will be familiar in certain aspects.
Ignitron is ME7 replacement ecu, so you wont be able to carry that over to DI and newer stuff.
I'd prolly vote for Ecumaster Black, they are a decent company and a top product.
Heard a lot of good things about the Ecumaster Black. I myself plan to purchase Ecumaster Black. Machine S3 8L me7.5+DSG stroker 2.0