There are lots of different 'packages' to choose from with many good deals on the market. Prices will vary according to the added hardware extras, the software bundle and the specification of the basic system. The higher the Mhz figure the faster it will operate. Aim for 400-450 minimum and higher if you can afford. RAM - Random Access Memory handles the operation of all software applications.
Software is memory hungry especially wordprocessing and games.
Go for as high a figure as you can afford. Minimum is around 5GB and best 12-20GB but ask advice on how much storage you need according to applications. A large monitor is preferable for viewing internet pages and DVD discs. Go for a 17 inch screen or 15 inch minimum. Opt for 56K to achieve maximum file transfer speed on an ordinary telephone line.