Dorman is about $7 a round turn, not sure who they clear with.
Am going to go with TransAct Software with Brewer Futures.
TransAct does their own clearing. round turn commissions are $4.50 for the e mini.
I used both Global Futures and Strategy Runner for about 4 months. When ever I called Global Futures I got a quick response. I have no complaints. Strategy Runner is a decent platform, but not if you are trying to scalp the market.
I am currently doing a demo with Dorman Direct platform...