Headphone for Lectures

I am looking for suggestions about buying a headphone, possibly noise-canceling, for listening to recorded lectures. I do not attend lectures, and my budget is $100 (for now). Should I just pay more for a pair of bose (300+) or beats (200+) for the long run? Appreciate the responses. Thanks.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums