Barrons have published their ranking for 2014.
Winner Interactive Brokers.
The Best Online Brokers of 2014 - Barrons.com

Interesting they went for IB again. I actually think they're ok their data still let's them down as a complete package (personal view) but a good all around choice.

Also I think it really depends in where you are based. If you're based outside the US (as I am) they have some big drawbacks in terms of moving your funds around. Slow is an understatement.

One more thing they waive a 10$ inactivity fee if you have a 100k account?! Personally I don't see that as a massive selling point.

I am surprised about the relative low rating of Livevol considering that they are an introducing broker to IB with an extensive options analytics platform.