I've used
http://www.LiquidWeb.com for many years. Pricier than some others but 24/7 Email/Phone support and they own their own data centers so no middleman should issues arise. I hear KnownHost.com & ServInt.net come up quite a bit as being decent but never personally used them so can't vouch for them. Wasn't happy with WiredTree's uptime many years ago when I put a clients wordpress site on it, maybe they have improved since then but I won't be giving them a second chance.
