I wonder what made you choose OVH. Did they give you a really good deal on dedicated servers? Have you ever considered rackspace? I hear they're pretty well regarded in the managed hosting industry.
Firstly, I had some good recommendation for them. Then I ask them directly how they handle DDoS and their response was pretty satisfying, they promise that DDoS attack won't be a reason for cancelling our agreement. Last thing is also that price for current server (which is mostly high-end; multi CPU, plenty of RAM, 10Gbit uplink, SSD RAID) was very good. They have officially 1 hour GTI and 2 hours GTR (time to repair issues), however they're totally failing now (which is hard to know in advance, unfortunately).
Btw I has been in touch with Rackspace, I even had servers here and hardware firewalls for fighting DDoS, for really insane money. But then I realized that even their "DDoS solution" is shitty for such large scale attacks which we have in bitcoin world, so I hanged it. And it was good choice, because their monthly price was *many times* higher than pool income at this days.
