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Wireless is always going to cost a chunk, and it doesn't sound as good as wired. The best wireless I've heard so far have been the Bang and Olufson H8 - but they are the better part of $500, and they don't sound as good as the wired $300 B&O H6. *shrug*
Here is a list of 100+ portable headphones ranked and by price point for review:
http://www.head-fi.org/t/433318/sho...eviewed-xiaomi-mi-headphones-added-04-21-2015
*searchable sortable version here: - http://theheadphonelist.com/headphone-review-list/ *
Ultimately though, if the kid wants Beats, its unlikely any objective commentary on sound quality is going to sway him. They are a fashion and social statement at this point.