The bass decay on TH600 and TH900 is a bit longer than the LCD2s (some of them will consider it's a bit boom), but I think for your reference music, it kinda suits your music preference. And although the bass is bit larger in term of quantity, but the texture is still there. Those new fostex headphones definitely have some great tuning in it.
I recommend you use a better source to drive those TH600 or TH900. They're not hungry in term of power, but you definitely need some good resolution DAC and amp to pump out the juice from TH600 or TH900.