What you say makes perfect sense. For me the decision to use VPS was motivated by cost and simplicity. But when it comes to my database server, IO will bottlene

What you say makes perfect sense. For me the decision to use VPS was motivated by cost and simplicity. But when it comes to my database server, IO will bottleneck me long before CPU or bandwidth or other such concerns. That will probably lead me to some sort of single-master, multi-slave setup — but I suppose I just feel like that could be substantially delayed if I were to have my DB on an SSD.