Yes - another great point that needs to be brought up.
bgp.he.net is a simple breakdown. You really want to double-check it with the other provider's looking glass. If your provider peers with Level3, check it with Level3's looking glass. Make sure to use a location close to you/the provider.
Tinet in Atlanta is basically hauling down data to Miami. It's not bad in Seattle though. It's GT-T now.
nLayer is actually a pretty good network. It was also sold off to GT-T.
Telia? Yeah, Telia does really suck.
Another good point to bring up: BGP doesn't mean everything. Just because your...
Some time in the future, I can see Digital Ocean getting acquired and having the fate of Slicehost. Plus, I'm not a huge fan of their service. It really does suck.
Anyway, might as well throw in my list:
RamNode
ShardHost
Perhaps BuyVM?
This is a cruel joke. I'm supposed to get 30/4. When I had the 30/4, my service barely worked. Now, while it's pretty stable, I'm only getting a third of the download speed.
Downloading the RamNode ATL test file, it's mostly 12Mbps with some bursts up to 20Mbps.
This is a bit of a impossible request. What application are you running that is heavily latency-sensitive?
Your best general bet is basically finding someone who peers with Comcast and hope for the best, since most (not all) American ISPs peer with them. Sharktech would be one such provider.