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VibeHosting.com, we can do $199/mo for 1000 GB or $299 for a P4 with 5mbit capped or burstable (1500 gigs).
Housed in eXchange colo on multihomed and BGP4 routed bandwidth. This is fully managed and monitored with response(!) 24/7 - our emergency support team is always ready to respond to pager tickets or reboot requests within 15 minutes.