I recommend that you buy a computer with a mid-range processor; one that you are able to get at a very reasonable price.
Purchasing a Cheap Used System
Depending on how much you have to spend on your computer, you might want to look at a used system. You can get a cheap recertified desktop by clicking here
and a recertfied laptop
Look at some cheap refurbished desktops here and refurbished laptops here.
A recertified/refurbished computer was returned by a customer. They are inspected for damage, necessary repairs made (if required) and then they are certified that they are in good working order. The computer is then re-packaged and it comes with a limited warranty. Click here to read about Recertified and Refurbished Computers.
Building Your Own Cheap Computer System
This is another great option and one that can be extremely rewarding!
Imagine building your own cheap computer using cheap computer parts .... your very own 'dream machine'?
Building your own computer is not difficult - you just need to thorougly read the tutorial before beginning to build your system.
A barebones computer is a partially-built system which you will complete by installing the remaining computer parts.
This is an alternative that should be considered by someone who would like to save money by building their own cheap computer but does not have the time and patience to start building their system from scratch.