There are several ECN brokers in market, but are Admiral Markets, Finpro trading, ACFX. As they have no restriction on setting stoploss, their spreads start from 0.0 pips using typical spread on EUR/USD around 0.3 pips.
Their commission structures are also very low. They've variety of accounts and to start you can deposit as small as $5 within their micro account.
As per my experience, they're so far the true ECN broker amongst those I trade before.
They let neteller as well.