I currently have a server w/ SB after having been with another dedicated provider. Been w/ SB for going on three months now. They are topnotch from both management and network perspectives. They're extremely quick to address and fix issues and I've never had a problem w/ network downtime from the GNAX DC.
Top-notch provider. Although I only have a shared hosting account with them, their response has been very prompt, and the Gnax backbone is very fast with zero downtime thus far. I imagine you'll get an even better service as a dedicated server client.