I've done some research on Cogent BW. I think Cogent has the worst reputation, but it ain't the worst bandwidth. And Cogent is cheap, but not the cheapest.
I don't say that Cogent is all good, but I don't trust the companies who state with big letters on their website "No Cogent". They probably use cheaper and worse BW then Cogent...
Cogent BW costs $1000/100MBit. I hope ServerMatrix doesn't sell the same BW twice...
By the way, I stay with
http://www.jupiterhosting.com
When I submit a support ticket, it will be read within minutes, instead of hours or days.