Wow, do you think the HE-400 has better bass than the LCD2?
That would surprise me.
When I owned the HE400 I did love the bass, but I wanted a tad more. If the LCD2 actually has less, then I think a fostex th600 would probably be all that I need?
One thing I've found with the HE-400 and LCD-2 is that the amount of bass tends to change with the amp in use. The TH-600 will have pretty good bass no matter which amp I use. Also, the tubes that are installed will have a effect on the amount of and quality of bass produced by the HE-400 and LCD-2. Its like if the headphone and amp/tube have good synergy the sound can be spectacular, it the pairing is not good then the sound will suffer. I currently have a Lyr2, Asgard2, and Project Ember that I use with the above 3 headphones, the LCD-2 and HE-400 sound best on the Lyr2 while the TH-600 sounds best on the Ember. Hope this info helps you.