You should have a look at OVH, they include DDoS protection by default and their prices are the best available on the market:
http://www.ovh.com/us/blog/a1171.protection-anti-ddos-servic...
And:
http://forum.ovh.co.uk/showthread.php?6661-URGENT-AND-IMPORT...
"Our surplus network has a capacity over 2 Tbps. We have three VAC in production, so we can manage up to 480 Gbps/480 Mpps."