Head-Fi told me the LCD-2 was the greatest thing ever. Head-Fi told me the HD800 was a brittle, ear piercing analytical tool devoid of soul. Head-Fi told me the HD650 was a slow, veiled and boring headphone.
The HD800 remains, and continues to impress. The LCD-2 was a disappointment I lived with for 12 months. I understand the praise, but I also think it's overstated. The HD650 is gone but will soon be brought back into the stable. It may just be my favourite out of the 3.
Never take Head-Fi as gospel.
Yup, it's all about the preferences.
I've tried the LCD-2's at multiple meets with different amps/DACs and they continue to disappoint me. Its soundstage is rather suffocating and the highs...just seem lacking to me. As a whole, the LCD-2 just seems too dark for my personal tastes, and it seems that that sound characteristic is carried on to the LCD-3.
On the other hand, the HD800 continues to impress me as well. I will never forget how "wowed" I was when I heard the HD800 for the first time. Everything just seemed so clear, airy, and very spacious. I would go for an HD800 any time, any day over the LCD-2, but again it's a personal preference for sound.
While on the topic of Sennheiser's headphones, I'm still not completely impressed with the HD650. To me it still sounds rather dark compared to the HD800 *cough Sennheiser veil* and its soundstage isn't all that large either. It's not a particularly fast headphone too, so maybe that's a personal preference as well (in comparison I really like the speed of the K 701 and SRH940). I can definitely see the appeal for it, but it's not my cup of tea.