Backbone recommendations / Cleardata long-haul?

I'm in the process of dumping our secondary backbone provider, and I am looking for recommendations on a new one. Does anyone work for, or use, a backbone provider that they feel is top-notch? I've been repeatedly disappointed in quality, service, and unmet promises from a variety of providers over the past seven years. Also, has anyone had experience with ClearData for long-haul point-to-point service? I'm looking to replace our connection to PAIX. ClearData is incredibly cheap, but they're also new and apt to make incredible promises. Before I start wading through their lovely indemnity clauses on their contract, I'd like to find out whether they're worth the trouble or not. Thanks in advance.