leaving ISPRIME out of this description is a travesty
that being said, regardless of the host, you'll find a few people that you won't mesh with ( that's a fact, not everyone hired is right for the job )
the best hosts, know who to keep, and know who to fire. they are constantly improving their backends, their support systems, their monitoring, and their teams. ( They actively poll for feedback )
but in the end you really do get what you pay for. i don't think I'd get a box a host that pretended that they don't give more specialized support to their bigger clients.