After reading around through many threads here on head-fi, I've come to realize that much of what characterizes some headphones as being 'better' than others is purely a matter of opinion. As such, I would like to ask for some opinions.
I'm looking for a pair of full sized headphones that deliver bass with depth and impact. The headphones I own and have owned have all been >$100 and definitely weren't audiophile cans. I've been looking into getting a pair of Sony XB1000's, and I've read both good and bad reviews. Most reviews were disappointing, but there was one review under which the reviewer wrote a detailed description of the sound over many milestones of time spent in the burn-in period. After 120 hours, the sound had seemingly leveled out to be rather impressive, even given its cost.
I'm leaning mostly towards buying the XB1000's, but I would like to know if there are any headphones that would be recommended as being more bass-y for around $300, and whether or not I should buy a headphone amp to go with them, as I'll be mostly listening off of an iphone. Which is sad, I know. Furthermore, if there are any specific portable music players that are above and beyond in sound quality, does anybody know what they are? I am familiar with different audio file formats and their pros and cons.
Basically, I don't know jack, and I want to know jack. As such, I am asking you to educate me in the areas I have mentioned.