I got one of these recently
http://www.ebuyer.com/product/150183
Superb for practicality and mobile surfing, however as with most netbooks it does not have a DVD drive. If its your main PC then go for a new one with a larger screen and DVD drive. Its just not worth saving £50 for zero warranty and outdated technology !
Personally, im not keen on Vista or Dell - ive never worked on a fast, smooth high steet purchased - Vista machine yet !
Look at HP or Samsung gear from Ebuyer, their after sales is superb and if you ring them with the specification you require they will find you the best deal and inform you of offers.