I prefer not to say at the moment because I have that provider on test, so if I can recommend is an excellent provider I’ve used in the past, it is called Hetzner in Germany:
http://serverboerse.de/en/
http://www.hetzner.de/en/hosting/produktmatrix/rootserver
I not using for the moment because the latency to my users in Latin America is high, but the network is really good to users in Europe
