Personally I'd stay away from nova (unless you have good fire insurance) I see lotd of them ... in fact they're paying most of my mortgage!
for �400 you are not going to get many options ....
built in - wifi is pretty standard
you need 1Gb of ram .... the rest is just luxuries
buy about �350 - use the rest to upgrade the ram.
go down to pc world ... have a look round .. ask a few questions ... have a play.
once you have an idea what you'd like ....
http://www.google.co.uk/products?hl=en&scoring =p&price1=350.00&q=laptop+computer&lnk=qsugt
When you decide ... talk to the seller ... don't just tick boxes and give your card.
tell them which machine ... ask what discoun't they'll offer on a ram upgrade
gluck