|You could build a nice one for about half of that.|
What is your budget?
If you take all advice and pick a quality list of parts, post that here for opinions, and refine it to the best you can afford but you still are not comfortable building it yourself, there is probably a local computer shop who could build it for you with your component list for a reasonable amount more than you could do it yourself. Then you can get what you want, get someone to do the work and test it, and that same someone will always be there if serious problems arise in the future.
Personally, I would build it for myself and recommend all who are capable give it a go as well, but if you are not up to it, this just might be an alternative.
Your budget will set your limits for the most expensive components so it is the place to start.
You have to be a little bit crazy to keep you from going insane.