For people that have tried both, how well does the X3 compare/hold up to the HD 650s/HD 6XX/HD 58X, which are generally at a similar current price point (at least 6XX is)? Now that my first X3 arrived defective, I am debating sending it back for a replacement or just getting a refund and ordering a 6XX instead.
I have a big head/ears and use headphones both for music/gaming (MMO, non competitive), but also work from home and wear them for conference calls about 80% of the working day, so comfort and ability to wear them 8+ hours straight is as important as sound quality for me. I have the X2HR currently and find them extremely comfortable/ear cups are the best I've ever used, but they feel a little too heavy when wearing them for hours at a time. I previously used the DT990, which I found extremely uncomfortable (mainly because the earcups are just too small for my ears), and the SHP9500, which were comfortable, but the excessive brightness of the sound signature, the weird earcup material, and the lack of stability (they feel like they just sit on your ears with no seal or clamp at all) drove me to look for an upgrade.
Thoughts on this vs Sennheiser 6 line? I currently only have an E10K amp.