Advent are very good but at £1275 it seems very expensive.click here The main expense would seem to be the 3.4 chip. This chip's 'advantages' are not usually noticeable by mere mortals. Unless you are well into gaming this chip will make no difference than most other chips. The Medions that are often spoke of here are only £749 (without a screen) but seem much better value. PCW usually have some in with screens for £999. I would also have a look at Mesh click here.
If you are just going to use the computer for word processing, surfing etc. it is way too expensive. You will not 'need' the 3.4 chip....guaranteed.