Are you a member of SGIA? (And if not, why not?) If you are, Yellow offers great rates. I'm using them to pay for a crate going to a trade show next month. The discount is much better than Freightquote offered. The difference in this alone paid for our membership to SGIA, by the way.
I hate Freightquote because of their every other day phone calls, even though I asked/told them to stop calling or I'd quit using them. They didn't, and I did.