I think Broadspire is a great company to deal with. Unfortunately, their prices are too high right now. They had a sale with sub $100/Mbps pricing, but now that their sale is over, you can expect to pay almost $300/Mbps.
I have been working with a datacenter in Wilshire-1 area and their service is awesome. I personally know the owners, so if you are interested in finding out more info then i can probably get you bandwidth with 100% uptime guarantee for about $135/Mb.
We have had service with Broadspire since '99 when they were in the old Marina Towers, @ SoftAware (ISI building) before they went DI. They run a tight ship and offer great service. We utilize their remote hands services and InterNAP connection in our Los Angeles cage @ 1200 7th St. I can highly recommend their service but it is pricey unless you are buying larger amounts of space or bw and usually requires 12-month terms. If you aren't quite ready to go direct to them we do resell some of their services.