I think the word you're looking for is "computer," not CPU. This is a CPU:
If you need a new computer, buy a Dell Vostro. They go on sale all the time for $379 WITH a 19-22" LCD. They are plenty fast and usually have 2 GB of RAM. Go to the small business section of Dell's website and choose the cheapest Vostro they have. You won't regret it.