I have several FX accounts- FXCM, PFG, and FastBrokers.
I scalp only the eur/gbp and eur/jpy. I use the Active Trader platform for FXCM but see the spreads widen too much during news, and the slippage is horrible. But I am having much success on FastBrokers Currenex ECN as the spreads are tight (typically 2-3pips for eur/gbp and eur/jpy) and I can pretty much get in out our pretty quickly. You can see the platform from youtube. The only thing with this platform is you have to pretty much figure out all the functions yourself as the manual is crap. Good Luck.
http://www.youtube.com/watch?v=WIrVbSlPTDU