Pretty much any £400 laptop from any of the big names will do fine.......40GB is an average hard drive size, if you can find one with more that's good.
Don't bother with anything with a whizzy graphics card etc (the spotty kids in Dixons like those ones 'cos they play games on them) unless your wife is into gaming.....but a Wifi enabled one would be sensible (hotspots are becomming more common and you will be able to use it anywhereat home once you've bought a wifi router)
Other than that, go in and play with some......there's a trade off between price, battery life and size.......if she's going to be using it on trains etc than battery life and weight might be the priority, but itf it's going to be more often based on a desk somewhere, the hard drive size and cost might be the factors to lean towards.
Ignore silly software bundles.......unless they chuck in MS Office or similar...certainly don't be swayed because any of them have a year's free copy of Norton or Mcafee....the first thing we'll all advise you to do when you get it home is take that crap off it anyway
Plus ask them for a free bag, and when they agree, add a free wifi router for your other PC......they'll go for it usually,(or at least give you large amounts off) especially on an out of town shopping site, cos they know you could walk next door and get the same deal....don't be afraid to ask
People will tell you allsorts.....some love Dell, some hate them, and the same with all the other big names.....TBH I reckon that these days they're all much of a muchness......my HP from Curries (£399) has done a stirling job and has been bashed about Morocco several times, but some people really don't rate them
In short, don't worry, you can't go too far wrong, just go and fondle some in a shop and see which you prefer
