If your looking for a dedicated game server Have a look here. Its from a sister (or whatever you want to call it) company to e-Frag.
I Use them for my webserver.
Dedicated Servers | SwitchLink | Windows & Linux | Manchester Colocation
Also i find teamspeak to be a bit lacking on quality whilst ventrilo has really nice hi-quality. We use a ventrilo server for recording as it is almost impossible on ts. ---But it is a matter of opinion and you may not agree with me---