I'd respectfully vote for eSignal (granted my obvious bias). There are many reasons that I feel we provide the overall best feed but the fact that eSignal has won Best Real Time Feed for 15 years in a row from Stocks and Commodities magazine speaks volume. Good luck in your search.
Are you a big advertiser with them? What we really need is opinions from actual users and EX users like me, rather than the opinion of a publsisher who may just have a reason to be biased.