I would suggest first figuring out how much money you can afford to spend each month. A "good" dedicated box is going to start out at probably $175 a month or more. When you figure out how much money you can spend, then look in that price range. My advice is buy more than you need, because you will need it in the future. Also, get more than just a few ips as well. One big benefit of a dedicated box is you can run TS or Vent from your box, makes it easier.
We use Wolfservers. They have good uptime, decent rates, customer service is decent. Only complaint that I have is their billing department seems to be messed up a lot. They keep sending messages saying payment was never received. Just a minor problem to deal with on a monthly basis.