If you're a med student, the Lange book is great. Also, the Harrison's Neuro section is very nice, and a bit more clinical. If you're doing a sub-i kind of rotation, the House Officer series is my favorite, but you'll want to supplement that with other resources. I like to use UpToDate, but NOT for the articles; I like the REFERENCE LIST. It can give you a good start looking up the original research behind their very opinionated articles. My institution just dropped OVID, which sucks, because it is more user-friendly than PubMed for complicated searches. Or maybe I just don't know PubMed as well.
If you know for sure you want to go into Neuro, you could buy the Adams and Victor. Or you could wait until you have book money as a Neuro resident. I don't think any med student needs the amount of information contained in that book.