If you want true ECN brokers, I would suggest you to go for Interactive Brokers. As much as I disagree with many of their practices, they are still the best ECN brokers for forex trading. One thing you need to remember though, there is no true ECN brokers out there for forex or even stock/options trading. You are always trading directly against market makers especially in forex trading and you will always be subject to market manipulations by the market makers. Hell, in forex trading, even the brokers themselves are subject to market manipulations by the liquidity providers, the ultimate market makers in retail forex.