Hey, first time poster....
I just want to preface my comments by saying I am by no means an expert in headphones, but have always been a big music fan and sound quality has become very important to me lately. I didn't realize until the past year or so what a great pair of headphones can do to the experience of listening to music.
I purchased the X2 a few weeks ago, and am coming from a Sennheiser HD598. I also have a V-Moda Crossfade LP2 for traveling. My decision to purchase the X2 was based, in large part, by reading comments on the forum, which are very informative and helpful. Before purchasing the X2, I tried the Oppo PM-3 and the HiFiMan 400s. The PM-3 and 400s were both excellent, but I think the X2 offers a richer, warmer sound and I am glad I found out about them when I did. They are simply the best headphones I've ever heard. The PM-3 was very articulate and the bass is tight and punchy. The build is high quality too, and, thankfully, I haven't experienced the cosmetic issues the others noted above. The V-Moda, despite being built to last a 100 years, obviously pales in comparison to the PM-3, as it is very muffled sounding, but I wasn't sure I needed to spend an extra $200 for a closed back headphone. I was more interested in getting something for the home, and the X2 just fit the bill better. The only criticisms I have for the PM-3 is that they were a bit too clinical sounding, and I wasn't crazy about the padded headband and smaller ear cups. Re the 400s, the clamping force was a bit too much for me, and, in contrast to most people's preferences, I didn't like the short cable.
The X2's comfort were not perfect for me though. The clamping was initially bothersome for me, but has since improved (the headband's metal is seems pliable), and the ear pads were a bit hard and itchy. I actually liked the pads on the 400s more. Anyway, I ordered the Bass plus velvet cushions from China. The cushion is softer, and the velvet material doesn't irritate my skin. The cushions make the a great headphone that much better for me. They are not cheap - $28 - and I had to wait about 10 days for them to arrive, but they are worth it. The bass seems to go deeper too, but I have to spend more time with them and make further comparisons with the stock pads to see if this is a reality or just a perception influenced by the advertisement "Bass" plus.
Thanks for reading...