In my opinion, HD800 may at times sound artificial solely because of its transparency. It does not have any house sound signature, it's so transparent some may perceive it as artificial IMO. If you are looking for more soundstage and better imaging, HD800 won't fail you. But if you are looking for 'meatiness' and musicality, LCD-2 or 3 would be a better choice. I've never listened to the LCD-3, but the LCD-2 is so musical I found myself thinking about it at times, even when listening to the HD800.
Simply put, no, HD800 will not give you the Sennheiser house sound.
I will not say HD800 is artificial, but I do agree it it very transparent.
The fact that it is transparent, makes it good to transfer all the information contains in the recording to your ear. If the recording itself is a masterpiece, it will sound lively with full emotions. If your amp is powerful enough, the phone can be "bassy" or "fast" depends on the mood of the recording. Because the phone itself is "tasteless", it makes the original flavor of the recording stands out more easily. It makes you enjoying the music more compare to the the phone itself.
There is nothing wrong with added coloring and flavor to the headphone which do make many recordings sounds better to your ears. However, I guess I am the type of guy that willing to spend more time to find a better recording instead of "better" phone for the same recording.
This is just some different approach I want to share.
I was also looking for a close phone for my office. LCD-XC looks promising, but do they make it more comfortable?
Dont count on it.