I have been using WestHost VPS for ages now (5-6 years). I have upgraded to their best plan. Recently I am noticing significant degradation of their service. Almost every morning (US - PST) my servers goes down once or twice (and probably more when I am not monitoring).

The load isn't that high. My bandwidth consumption last month was merely 46Gigs. I have a feeling that my provider is packing too many virtual hosts on the same server. I do however expect significantly increased traffic in near future.

My concern is that my reliability is being significantly affected as also my SERPS.

Do you think it is the right time to go for dedicated server? What criteria would you use?