HeadRoom's measurement data is straight off the scope, so to speak. Unless you're an engineer, you're likely not going to understand the whole meaning of the peaks and dips in the graphs. The important thing to know generally is, the fewer the better. Headphones are notoriously difficult to measure, and even the very best headphones have complex graphs. So, look for simple results but don't be surprised by a lot of wiggles---they are normal. And take everything with a fairly good sized grain of salt.
