Coming from TOS, a Little Confused About What to Choose

NinjaTrader 

I am not sure what you are referring to but NinjaTrader does not have slippage issues with placing orders. Orders are transmitted through CQG servers with direct access to the various exchanges. I can tell you that Interactive Brokers latency for order submission is higher on average than CQG/Continuum which is what the overwhelming majority of NinjaTrader customers use.

@NinjaTrader,

My comment is from the very old memory and reading a few threads here. Again I've been away for almost 6 years and I'm just started looking into preparing my trading setup. The ideal situation is that I use NT and use the NTB all in the same house and more than willing to try this...