Best ECN in the game

Greetings forex friends!

I am looking for a true ECN broker with the following specs:

[ul]
[li][B]25% Margin Call[/B]
[/li][li]Low Commission
[/li][li]Super high speed connection possibly with VPS services
[/li][li]Up-to 1:500 Leverage
[/li][li]preferably UK Based and Regulated
[/li][/ul]

Any suggestions

Thanks in advance