I have been with Empire-Hosting/Empire-Tech/Lowesthost (delete as applicable) for about 3 months now, and their managed hosting has been a massive asset to me. I bought a cPanel server with loads of powerful spec etc for hosting ,and since i got it, at an amazing price, they have support me all the way. They redid the boot sequence, repaired a problem with HTTPD, fixed everything that i couldnt for my clients, as well as installing and supporting all the scripts i ever needed on ti.
Their prices are great, and support ticets are 24/7, with the max wait time being about 20mins for me
They truly were excellent, i had a VPS with them before, and that was awesome too. I never had any problems, so this is all positive!!!