A laptop or desktop would be okay. If it's a desktop, could you include things such as the sound card, keyboard, monitor, etc.?
We can help you finding a laptop around here.
-> For a desktop build in your budget range you want to ask the guys in the Systems section of the forum
They have their own version of a form to fill out for a desktop:
If you fill out the form in *How To Ask For New Build Advice*
you'll answer all the standard questions that help things get started.