The good makes are the usual suspects: Toshiba, Sony, Acer, Dell, HP, Compaq, Lenovo (IBM).
Avoid cheap "no name" clones from places like PC World and Currys. Name likes Advent, Packard Bell, E systems come to mind.
As Ethel says, you can get a prefectly good Word Processing package for free (or very little) so dont need to pay out for Microsoft Office (which is way too expensive AND over complex for most home users)
If you insist on Microsoft Office then get the Home and Student edition which comes with Word, Excel, Powerpoint and OneNote and can be installed (legally) on 3 PCs.
You can get it for less than �100, see here
http://www.amazon.co.uk/Microsoft-Office-2007- Student-Licence/dp/B000HCZ8EO/ref=pd_bbs_sr_1? ie=UTF8&s=software&qid=1199902714&sr=8-1