Hi Alan,
Where did the original 50 EAs come from and why have you used the mt4 tester rather than just use EA studio?
Soumds sensible what you are doing to get round the FIFA rule.
How long have you been demo trading? It sounds like you are going straight to live? If so I would strongly recommend doing what you are doing with demo for at least a month or two first.
Of the three options you have given I would say profit factor but definately trade them for at least a bit on a demo account to make sure you are happy with their performance.