Hello,
The following all features are important when you purchase the VPS.
Configure, Budget, Service, Quality
Currently, i am using VPS hosting of Accuwebhosting. I have fulfill above all features with them. They offer cheap and best VPS hosting service in 14 location. Also, they offer the VPS hosting in both environment(Linux and Windows).
I am using their hosting service since couple of years. Also, they provide 99.9% up time.
Also, they provide the excellent support in Live Chat and Ticket system (email). They provide support 24*7*365.