I can give you a first hand observation since my LNS3251D arrived from Newegg a couple of days early.
The picture out of the box is very, very good. Regular cable, through the Adelphia digital box, looks surprisingly good vs. other LCD's I've seen. The HDTV is excellent. Good black, no ghosting that I've seen and contrast is as good as advertised. Excellent brightness as well. I am watching NASCAR in HD right now and the image is clear and life like. I am currently hooked up through component since my Adelphia box still doesn't support HDMI or even DVI.
Over the air HD looks excellent as well. I don't know why, but reception on this set is better then any other I have in the house.
The base could be better since screen rotation is limited. A big disappoinment to me is the sound. The base is lousy. Even after playing with the more then ample adjustments, the sound still sounds like it's coming from pc speakers. I plan to remedy this using the optical out with a good receiver and speakers.
Hey, it's a lot of money ($1320), but after seeing the LNS3241D at Circuit City, this one does seem to be worth the extra $100.00 or so in both image and overall appearance.
The screen only swivels about 30 degrees either way. Where I have the set situated this is not a big issue. If I must further turn the set, I can turn the base since the unit isn't very heavy.
As for the sound, the speakers are SRS TruSurround XT. In addition, there are 5 different modes available (standard, music, movie, speech and custom). Also available is an equalizer adjustment. There is also a setting called Auto Volume, which I'm still not sure what it does.
I wish the speaker sound quality was better. The speakers sound like there small, cheap speakers. I can't get rid of the "tinny" sound. In fairness, I'm going to try a better grade of rca cables, hoping that helps.