I've been an onlooker for a good number of weeks, I now offer my own listening experience, for whatever it's worth.
Since I got my Intruder, it was the HD600 and SE535 with stock, Cryo OCC Copper, Pure Silver/Gold with soldered with Mundorf Premium. Balanced out seem to offer a fuller sound, more distinct with the HD600. The SE535 with the upgrade cables and balanced output can surprisingly deliver a punchier bass. Just a word of cautions, the SE535 on mid settings and unchecked volume level can hurt the eardrums in just a short period of time. Thankfully with the Intruder on balanced output, I can enjoy listening at low volume levels. Maybe the DHC Cables and my DIY Silver/Gold Cables also contribute to the Superb transparency, and fuller sound, as well, I really don't know as I am not a technical listener and do not wish to be one. But I sure am happy with what I hear. However, I am not happy hearing a static-like sound sometimes, as I turn the volume knob of the Intruder to a lower or higher volume. I do not know what is the cause or it is just my unit. I would like to hear if this is the same experience of other owners.
I do listen to a variety of Genres and only have apple lossless. I can listen for many hours. I seem to get better quality and more engaging experience out of the WhipMod/WhipLod FatBoy compared to my Mac Mini Servo via USB Cable. Likewise, watching Movies/Music Videos with a 27" 3D LED Monitor can be a very engaging viewing experience. The dialog, background music, and sound FX is clear, crisp, and 3D sounding. Love the details. Definitely better compared to viewing in the living room with the 42' and Surround System. Happy that I no longer need to compromise and put-up with mediocre sound quality especially during mid-night viewing when everyone's asleep.
Quite delighted with the small footprint of the portable rig. I now can enjoy listening or watching a video, anywhere at home, anywhere at work, during business or leisure trips, indoor or outdoor. Yeah, I decided to put-aside the SE535 and passed on the HD600. It's just the LCD3 for now. The Intruder seem to be able to drive the LCD3 to significantly higher level, even with the Mac Mini via USB, as source. Delightful is hard to describe. Well some headfier say that the performance significantly gets better, with more hours of use. If that's going to be the case, I better get myself ready for the Ultimate Listening Pleasure. I can't wait to actually hear the impressive difference.