Try PC Option click here
In particular, click here
I have used them before, they perhaps do not build the worlds best computers, but it should be more than enough for your needs, and I challenge anyone here to get a better price than them.
Their customer service is also superb, and they have a 5 yr warranty as standard.
It comes with Open Office, a free alternative to Office, and it does the job just as good as the MS software.
It has a DVD RW and CD RW also.