As I know, one of the best VPS hosts offering
Custom VPS deals is Topxen.com company.
Their technical support is outstanding - support tickets tend to get a response within minutes, which usually resolves the problem.
In conclusion, I'd like to suggest this decent host to any business site or new personal with no idea about how to build a web site personal blog/forum and who is looking for a new provider or even looking to move from the current host that got on the nerves.