Check out Vision. These guys have good pricing and they use Rithmic as a front end. I can't speak to reliability yet but I'll post a review soon.
OK, Vision does have a securities division and charges $6.00 plus $0.75 an option. Not what was requested.
There are indeed lower comms than $.6 per contract w/ no per-ticket charge, but for consistently high volume clients, and (I'm guessing) not from the types of brokers you're talking about in this thread -- rather, from brokers more on the instututuional side that require several hundred thousand (or more) to open a new account. Such accounts tend to be pass-through accounts that pass on the ECN/exchange fees/rebates to the customer.