It depends on what you're looking for, especially as far as management. If you're unsure of what's covered, be sure to read through each company's definition of management... it really seems to vary a lot.
I'd probably go with Tranxact Global (Gnax) or Liquid Web (affiliate link). Or even Rackspace.com if you want to shell out more $$$ for fully-managed. I think Rackspace starts at close to $350/month, though.
For un/semi-managed, I've had good luck with ServerMatrix.com--but they're not taking orders now, either. Ev1's network seems pretty impressive, but if you can't manage it yourself, you'll probably need to hire a 3rd party to do it for you.
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