Haha, I'm thinning down the herd though. I owned all those at the same time a month ago when testing, but returned the nighthawk, oppo and dt770. Sold LCD-2 just recently, trying to sell the M-100 and maybe the TH-X00.
You might like the TH-X00. It's very slightly warm I would say, with a downward sloping W signature but the 's' sounds can get crazy at times (I'm slightly treble sensitive). I find the bass on the TH-X00 slightly muddy, boomy and overblown though. It has the visceral sub-bass some cans might lack, but that's pretty much it imo. I prefer the planar bass of the cans I have, it's much cleaner to me. Like I said, very good value at $399, but not much else. Don't expect it to have the magical bass the TH-900 has at a third of the price. YMMV