pronethosting.net was created in 2001 and is a US host. They recently changed their name to CoolHandle.com following a merger. Pronethosting.net states they have under 50% utilisation of their hardware and add additional capacity whenever they reach that point.
Pronethosting.net have fantastico installer scripts which makes installing wordpress a doddle.
Pronethosting.net have a 30 day money back guarantee which I always like to see. They also offer free transfers if you want to move hosts for an existing website.