Personally i think Phatservers/AmeriNOC is a great company so if you're running into problems most likely there is an unsavory mix of scripts at play.
However, we have developed some amazing technology to host wordpress sites so if you're interested in trying something new check out
www.RealityCheckNetwork.com
Your can contact me on ICQ: 4930562 or ( sales AT realitychecknetwork.com )
Additionally we have an extremely advanced monitoring system which we can setup to ensure that if there is a script / server failure we'd be notified within 60 seconds and most issues are resolved within a few minutes ( ~5 ).