And just to pile on the thread..
You want to be careful about buying from a tier 1 supplier. While the
price is amazing, you aren't getting blended internet that has other
upstream providers and some local peering thrown in.
For example, if you grab yourself 100Mbit of DIA for an unbelievable price
from "Mr Big Tier 1 Backbone", you aren't getting yourself much diversity
from an Internet standpoint, and certainly not local (Toronto) peering. So
local users might have to go a few extra hops and a few extra miles to hit
a site that would otherwise just hop through Torix. You also have a single
point of failure. If something happens with the network or peering of your
upstream provider and the rest of the internet, you have no routing
diversity. For example, when Cogent and Level 3 argued about peering and
split the Internet, you'd have been invisible or unreliable to a chunk of
the world if you were only using one of those 2 vendors. Another example,
when Level 3 hit their BGP entry limit last year they destabilized the
Internet, and my ISP decided to stop using Level 3 for a little while until
it got remediated. I'm not saying any one vendor is good or bad, I'm
saying that a smart person doesn't put all their Internet routing eggs in
one basket.
If I had an ASN, and was simply looking to advertise my IP networks on
multiple tier 1 carriers, then I'd pull the trigger on super cheap
bandwidth from a couple of "Mr Big Tier 1 Backbone" providers along with
setting up peering at Torix, but I don't have that yet, so I opt to buy the
little more expensive blended internet that gets me network path diversity
and Torix.
$5 to $15 per Mbit is what I've seen (recently) for good quality blended
DIA at 151 Front.
And that is my 2 cw..
-Marc