I would generally not advocate using any kind of preset setting for EQ, because in order to properly address the idiosyncratic issues of your particular headphone, you need to actually be able to control exactly what frequencies, how broad or narrow the bandwidth, and what amplitude, according to the exact frequency response of your headphone.
In the case of LCD-2, because they are hand-assembled, each headphone would measure slightly different from each other--if you look at the variety of frequency response graphs that people have posted of their particular LCD-2 (provided by Audez'e with every LCD-2, when they test the headphone before shipping it out), there are minor differences between them--especially in the treble and upper-mids.
If you are serious about this stuff, learn to EQ properly with a good visual parametric EQ. Study the FR graph that came with your LCD-2 and then address the unwanted dips (there shouldn't be any unwanted peaks, but if there are, address those too). You have to know how to read headphone FR graphs though--they are not supposed to ruler flat so do not EQ them visually flat like a ruler. Read up on it at HeadRoom.
I spent almost a year perfecting the custom EQ curve of my LCD-2, and it's about as perfect as I can make it, and I have zero interest in the LCD-3.