http://www.samys.com/product_detail.php?item=8464
We just ran series of our own tests on it yesterday for sharpness, color, vignetting, IQ, and low-light capabilities. We decided to keep it.
It's quite a bit sharper than even our 1.8 (50mm) (vs. 50mm 2.8).
Easier to brighten a picture than sharpen it.
It might cost a bit, and the build quality isn't up to Nikon's standards, but we believe it's an awesome value for your money in image quality. Compared with the lens it is comparable to:
http://www.samys.com/product_detail.php?item=6838
it's a steal.
This lens might be the most versatile (many, many people like it):
http://www.samys.com/product_detail.php?item=6845
so it might work for her, but I've never used it and I prefer faster glass (shoot a great deal of low-light). The VR is supposedly 2 or 3 stops faster, but again, I've never used it with any lens other than the 70-200 w/ VR. Many people love this lens. It is somewhat pricey, but it does have vibration reduction (which works).
If you want to save a buck and she doesn't do a lot of low-light shooting:
look like a hero and get her this one, it's plenty sharp and we might pick one up ourselves for our 3rd body (some of our shoots are 2 photog shoots).
http://www.samys.com/product_detail.php?item=10861
yes, the refurb should be fine. it's a great lens. recommend it for anyone who doesn't shoot a lot of low-light and wants a better lens for cheap.