det-Personally, I rented mine through nfoservers and I'd say I'm happy with it. It seems to get ~5-10 ping less than serveme servers in the same location
Our Dallas and Chicago servers marked with (Anti-DDoS) are at NFOservers, so those should ping identically to something you rent yourself. In both Dallas and Chicago we also have non-NFO servers, which might ping better or worse depending on routing.
tony, since you're from Mexico, I suggest trying NFOservers in Dallas. You can try one for free at https://na.serveme.tf (they're called serveme.tf NFO Dallas #1-8 (Anti-DDoS)), that way you know what kind of ping to expect if you rent one yourself at NFOservers.