Given your price range, I can't suggest anything cheaper than this one. Because it's going to have a NetBook(Atom/AMD E-Series/ARM Chrome) CPU, which is niche for usage and slow for performance compared to standard 5-6 year old CPUs that your wife may already have. Basically a disappointment.
Low-end. $430+delivery
http://www.amazon.com/ASUS-K55N-DB81-15-6-Inch-Laptop-Black/dp/B00COR29XI
It's actually an outstanding unit for the price. Good AMD APU model(you have to know which AMD chips are good, and which aren't), this one is IMO is among the best because you wont match the performance for the price with other AMD chips or Celeron/i3 systems with wimpy Intel GMA graphics. It's native 720p resolution is the downside.
High-end $550+delivery (of your spectrum)
http://www.toshibadirect.com/td/b2c/retail-product.jsp?poid=2000071695 Which can be found here for sale.
http://www.bestbuy.com/site/Toshiba...lver/9041726.p?id=1218974707505&skuId=9041726
Good specs all around. For your wife's needs, it will outperform the laptop above, but it will be significantly slower for games that require directx(games that use 3D) due to the basic Intel HD graphics. Better resolution and screen in general.
HP sucks for budget anything now. Everyone who knows anything is pretty baffled at how they can remain in the laptop business. Dells are okay if you buy an enterprise model, nothing in your range is an enterprise-type model :nope: and even then, you need something very specific to make it worthwhile over their competition.