The company I've been using is EasyDNS. I've been very happy with the service for the most part. This is second such attack on them in the past five years, and in both cases the attacks have been related to pornographic and gambling sites they provide domain services to. Luckily after this latest attack it appears they have decided I adjust their user agreement and qualifying site practices. Hopefully this prevents future attacks. I'm also in the process of developing a backup strategy to prevent MacScene from being so reliant on a single service. You can read more about this specific attack
here.