Can't seem to find a decent one out there. FSA regulated and has the metatrader 4 platform

Answer
Hotforex is a good broker, they have very low spreads, low deposit, ecn, micro accounts, mt4 but no fsa, they are regulated by FSC

What Forex ECN broker should I choose?

I am also demoing the Currenex ECN platform. I am looking to open a account with this platform but there are several brokers that offer this. Any suggestions?

Here is a youtube video of this platform:
http://www.youtube.com/watch?v=ImHoCn713LY

If there is a better ECN platform out there, please let me hear your suggestions.

Answer
You can also try FXCM's Active Trader platform. It displays level II type depth of market to see liquidity at each price level and is a no dealing desk (STP) platform.

http://www.fxcm.co.uk/active-trader.jsp