I have had the LS50's for 5 months now and I would like to give my opinions so far.
Well.. I just love them! And now that that's out of the way let's go to specifics
My current setup:
Antimode 8033 Cinema
Denon X-1000 (MultEQ XT)
Use: Movies (blu-ray) and music. Music varies from cuban music to jazz and from r&b to classical and beyond.
My PC is connected to the audio system via HDMI and I use both it and WDTV live for music and videos. I use the WDTV Live when I want complete silence (gaming pc makes some noise) and no other distraction. Facebook I'm looking at you and your *pop* noises.
I have had two different rooms for the speakers with the same equipment and that is something I would like to share as I have found the results interesting. When I first bought the speakers, I used them to replace my Wharfedales (2x 10.2 + 10.CM) as I noticed that I had used so much more money on everything else in my setup and wanted to see what I could achieve with better speakers. I know, it's the basic "me wants" situation but what can you do? I had heard and read that the LS50 wouldn't have so much bass but it didn't worry my because I knew I would be using the sub with a crossover in the 80-100 region anyway.
My first setup was so that the speakers were 3 meters apart from each other and about 0,5 meters from the wall. The room was a basic apartment building living room and my distance was about 3-4 meters from the center of the speakers. The speakers were on basic 60 cm speaker stands. In that room they sounded phenomenal! I wondered about all the talk about the lack of bass because in that room the LS50's went so low I didn't even always remember to put the subwoofer on when listening to music (jazz/latin music). The speakers sounded very clear and detailed but even then I knew that the room layout was terrible and a part of the sofa was muffing the sound of the left speaker. It wasn't directly on the way as I could see the speaker but from my point of view where the speaker ended the sofa started. I could hear a tremendous difference if I raised my head even 10 cm. So visual contact to the woofers is not sometimes enough.
I then moved to my current, temporary apartment. I decided to unite my PC and A/V stuff to save space but in an ideal situation the speakers would be on stands on the sides of my desk. In this apartment, I have to have them on my cheap Ikea table and it really does some serious work on the sound. Before running Audyssey they sounded really muddy and all the bass was gone if run without the subwoofer. Audyssey worked quite well they sounded little better, and this near-field situation the imaging is of course perfet. I then decided to buy some basic speaker pads. That was the magic trick for my situation! The sound was so much clearer and detailed, I can really recommend this for anyone thinking about a table positioning for these (or any) speakers! Proper stands would, of course, still yield better sound.
Now I'm desperately waiting to find a bigger and a more permanent apartment, if that even can happen for a student with my income. I would really like to have the LS50's on real stands as that really changed the way they sounded! I already know which stands to buy, based on the height of my desk and my listening position. In my next apartment, the speakers and audio layout will be the defining thing, everything else will just have to follow. All in all, these speakers are the best I think I will be able to afford for 5-10 years and I have to say I'm in no rush. It's actually hard to imagine what better speakers would sound like, these are just so clear, detailed and focused but "bigger" than what they look. Plus they look amazing! I think I have found the speakers that will last me a lifetime. Unless my studies in musicology end up paying really well after graduating