Recommended usenet server(s)

My existing newsfeed (from gradwell.net in the UK) has been outsourced
and, while it still works, it's much slower than the Gradwell in house
server was so I'm considering alternatives.

Can anyone here recommend a server that works well with tin (i.e. it's
fast for interactive use)?  I'm happy to pay a little especially if
the server is good and stable for the long term.  I've no need for
binary groups.

Oh, by the way, Gradwell is now reselling readnews.com so anyone else
doing the same will presumably be no faster so they're rejects for a
start. 

-- 
Chris Green