I am Patrick..I am having minimum 85 sites runnings as my website designing projects. I had hosted them with my dedicated servers earlier but I found that too much coastly than the actual income which i am getting from the sites. I then tried Reseller Hosting plan of Prewebhost.com. At start I swithced few sites with their reseller but after getting trust i have bought around 3 reseller accounts and now getting best results for income since last 4 years. High uptime and best high resource services is the key feature.
With resellers there is no issue about configuring own servers, getting paid support etc. its just in budget in all angels. Best service. you must try.