LCD-2 rev1 - not heard
LCD-2 rev2 - Very smooth, musical and fleshy but lacks air and resolution compared to the others
LCD-3 - Only heard it once, sounded very hefty and more open than the LCD-2 but significantly more recessed midrange with some upper mid graininess. My least fav among these.
T1 - Very good tonality. Excellent mids, strong bass. Precise treble. Very, very deep soundstage. Only real problem is some treble edginess. Would be fatiguing after extended listening.
HD 800 - Massive soundstage. A very high-resolution sound, no resonances. Bass is very very very well controlled. Treble is very clear but elevated with some particular edginess at 6khz. Causes sibilance and cymbals to sound bad. Midrange can sound thin, needs good amp that adds warmth without loosing clarity. Overall my fav among these.
My vote goes for the HD 800, with the T1 at a very close second. Keep in mind that the LCD-3 I heard may have been "veiled".