There are others to consider, don't just pay for a name, don't pay over the odds for one that has features you realistically are never going to use, consider what you want from the ecu, and as said location of who you want to use, although I always think it's worth travelling as far as needed for the person that you want to do it anyway.
You can get a decent ignition and fuelling ecu for £350, nothing fancy but got all the bits you need with no extras.
I would also consider ease of backup should it be necessary.
I don't know for certain but assume they would all have a base map ?, as close to the spec you are doing as possible.
tabetha