Dustin
As far as I know, the software that Global Access uses has what they call 'auto route' that searches for the best price, and I don't think there is any way to exclude market makers. I could be wrong, but I think that's the deal.
I have used the software that they use (through a different company.) I will say this, the charting is pretty pathetic. There is just so little customization you can do. I saw your Cyber setup on another thread; I don't think you'd be able to duplicate your chart setup on their software.
If you are interested in that software, there are a few other brokers that offer better commission structures. F1 Trading is $12 ($9 for 250 trades/mo) and SuccessTrade is $8/trade (although I think they're pretty small time, plus check out the review on this site.)
There's another company, Exptrader.com, that offers the same software. They start at $14/trade. I'm in the process of opening an account with them because they have the NQDS feed from Nasdaq. Of all the brokers I've looked at, only Exptrader and Blackwood mention on their websites that they have this. Supposedly you get the quotes faster, especially when the market is moving faster, like during the open. (May not make a difference to you if you're just trading when the market is dull.) I should start trading with them Thursday or Friday, so I'll try to update then what kind of delay is involved with other brokers. (I'll run it side by side with my other trading software.)