I also found the LS50's to be a bit overly bright sounding, so maybe that's your ticket. The only other speakers on the list I have heard are the Monitor Audios and other Zu Audio models. I was pleasantly surprised by the Monitor Audios, and they were being run off a modest system. The Zu's that I have heard do what they do very well, but what they do is not for everyone, and it's not for me. I find the highs on the Zu's to be a bit bright, and peaky, and the midrage to be a congested sounding, if very fast and clean. What you should be careful about is mistaking an uneven, peaky midrange and treble for an overall forward sound in these ranges. A smooth tilt up in the power response as you go higher in frequency may be pleasing to you, but I would expect you would find a peaky frequency response to be fatiguing.
The best advice I can give you is to try to audition any speakers you're seriously considering in your own home, with your own gear and your own music. A good Brick & Mortar dealer will make that possible for you.