My organisation is in a position where we are paying quite excessive charges for single homed IP transit form our primary data centre provider. We're at the position now where we're ready to start thinking about switching to direct relationships with transit providers.
The question here goes touches on the subject slightly, but it's not very comprehensive. For example the accepted answer states Cogent and Hurricane Electric are considered cheap providers, whereas Level(3), AT&T, Telia are considered to be better. What it doesn't do is explain exactly why one provider may be better than another.
I am quite familiar with BGP, multihoming and the concept of peering and transit, however what I don't have is an understanding of why some of these providers would be better than others.
To be clear, I'm not asking for a suggestion for a provider, or any names mentioned for that matter. I'm more than happy to go off and do my own "shopping" research. I just have the problem that I need to compare apples to apples, and I don't know what to look for!
If it makes a difference, our organisation is in the UK.