I have 30+ servers with servermatrix/theplanet, their support is very good. If you want to test download speed, just sent Send me a Private Message, I will give you a RAR file's download link.
(sorry for my english)
I had an unmetered server there, and it was "ok." Their support was slow, and often unintelligent. Also, it was congested very much most of the time, could only push around 10 mbps most the time (during the times it was needed most).
Hay algunas opciones para usted .. pero la ventaja de ServerMatrix es que ofrece 20mbps unmetered cuando la majoria de las otras opciones ofrecen 10mbps. Busca "Unmetered" aqui y vas a encontrar algunas opciones.