I just bought the KEF LS50's, primarily for use in a condo, where I must be careful of the volume. I haven't yet set them up, so I can't provide you any perspective of their sound.
However, there is a YouTube video of a pair playing several tracks of music... and... you can get a pretty good idea of their sound, soundstage and imaging capabilities. It's consistent with the reviews, which suggest they perform as well as multi-thousand dollar speakers. I selected them over the smaller Maggies with the bass panels. The reviews all report nothing really compares in the price range up to $2000+, and that they'll fill a smaller room with a life-like soundstage and image. We'll see if my decision was right - but, I think, probably so. At the very least, I'll have some of the best near-field speakers available.
I'm going to supplement them with the KEF R400b sub to warm them up a bit, and add some weight to their sound. That combo should give me a pretty close approximation of the KEF Blades ($30,000), for a relative pittance - same mid / treble driver, and similar bass drivers.
However, they do require some pretty hefty electronics to optimize their performance - they're pretty inefficient, with a sensitivity of only 85 db. I think I'm going to drive them with the W4S STI-500 (250 watts / channel into 8ohms), which also gets superb reviews, which report it competes with the "big boys." And... it will drive the Maggies quite well, if I later decide to switch. While I've seen some reports of them doing pretty well with the Unison Research Set amp... I would stick with a 150+ watt solid state, or hybrid amp, at a minimum. If I want to give them a bit of a tube sound, I'll use my tube line stage, or a tube buffer.
I'm hoping this will do the job until I have the space and privacy for my Maggies, LaHave's, Vapor Audio's, Evolution Acoustics, or Selah's... or... maybe... Emerald Physics CS3's (all real "giant-killers").
Edited by Gradofan2 - 1/25/13 at 3:06am