Our new site for 2015 will be live on Monday (feel free to PM me now too if you like). We specialize in xenForo. All our servers offer cPanel, Litespeed, PerconaSQL, hourly R1Soft backups and much more. We have several communities that I know have moved from DreamHost to us as I did their free cPanel transfers We host many communities from just a few threads to communities with over 4 million posts.
I recommend Host Blizzard (@Eased). They're very low cost (I currently pay $3.20/month) and are quite good quality, and offer outstanding support. I've never had any problems with them, or a reason to switch away from them.
Host is really going to be dependant on a few different things such as, size of site, amount of traffic, experience with hosting panels/ setting up servers etc. For the not so technically your going to want to jump to shared hosting, only because everything is maintained for you for the cost, plus usually available in a control panel. But at the cost, your sharing your resources with many other users, so if your set on maintaining everything through a CP like cpanel, your going to have to spend a lot of money on licensing or find a provider who can rent you servers with the license(which others have stated, it's usually about 15 bucks at least a month). Alternatively, there are many free control panels that work just as good with a little knowledge such as webmin or vestacp.
As for great providers, always have to recommend ramnode.com for VPS. Can't go wrong with their performance.
What's your site? Would help to suggest services providers to best fit your needs. Also be wary of the hosts that claim to be xenForo hosting specialist but only charge $5.00/mo and can't even give you 10 xenForo powered sites they host. Popular choices around here include myself, MattW, URL Jet and Nimbus.
I would actually be worried about a host that just gives that sort of info out without first asking each of the 10 sites. I personally could care less, but I know many clients would care. Its not a good business practice. Though I am sure a major host would have a few up their sleeve that they already asked permission.
Was exactly my point If you don't have references, your not big enough yet to claim your a specialist in the niche, nor have many clients in that niche. I'd say at least 1 out of every 3 of my clients tell me to use them as a reference if ever needed.