Dali Opticon 2 vs KEF LS50: which should you buy?

The KEF LS50 is my pick in this pairing. It leads on every listening aspect I care about, and the gap on sound quality, midrange and treble is wide enough that I would not agonise over the choice.

Buy the Dali Opticon 2 if physical fit and ease of driving matter more to you than the last increment of resolution. It is the taller cabinet with the larger mid-woofer, it is rated slightly more sensitive, and it accepts a wider spread of amplifier power, so it is relaxed about what you put in front of it. Its character suits that brief. The presentation is balanced and versatile across genres, vocals and instruments sound natural and well defined, and the top end stays clean without turning sharp, which keeps it comfortable over a long evening. If you want capable sound in an ordinary living room without auditioning amplifiers first, that is a sensible place to stop, and the money you spend is well used.

Everyone else should buy the KEF LS50. It is the stronger speaker on sound quality, midrange clarity, treble detail and low end control, and it also takes design and value by a clear margin. What you hear is a speaker that resolves a recording rather than flattering it, with voices and wind instruments placed in the room with you and a top end that pulls out detail the Dali does not reach. That honesty cuts both ways, since a weak source or a tired amplifier will be exposed, so partner it with some thought and spend time on placement and toe-in. Neither of these is a basshead speaker, and I would still add a subwoofer for films. The longer warranty is a small extra reason to prefer it.