Couple questions about this:
1. More bandwith = more secure from ddos attacks?... right?
2. They advertise 10gbps... is this 10gbps to internet? Erm i guess i mean, will people (theoretically be able to) download from me at 10gbps lol?
3. Any reviews you can give me regarding OVH and especially regarding their 10gbps lines?
4. Any other hosts you can recommend who are very secure regarding ddos attacks?
More bandwidth does not technically mean more secure, just means you may be able to withstand more of an attack. With 10GBps, I can see it being a shared line. It doesn't matter how much bandwidth though, you need to find a host who does server hardening, has software/hardware firewalls to prevent the attacks. Hope i helped.
Do you have a specific location you're looking for? You initially were looking at OVH, but then ask for recommendations on Singlehop, obviously a quite a bit of a geographic jump when you're talking about game servers!
You set a budget of $500, is that per server, or for a DDoS solution? DDoS solutions are inherently expensive, because of their very nature, requiring a good deal of available bandwidth capacity. If you're serious about stopping DDoS, make sure you're willing to swallow the budget pill required.