KEF L50 Metas with KC62 = excellent sound. I had that in my office, and I loved it. I gave away the LS50 Meta to family and got the even cheaper Magnepan LSR+. In almost every measure I like the LRS+ more. It needs a lot more power than the LS50. I use the KC62 sub with the LRS+.
AS good as the LRS+ setup is, my Livingroom setup is a lot better with the Yamaha NS5000 speaker. I rotate a Benchmark AHB2 amp and a CODA #16 amp on it. Huge price deltas between the 2 amps, but they both sound excellent. Do not let the Yamaha name make you think this is not top of the line gear. It is one of the best I ever heard and at a not so audiophile price. We are talking KEF Reference, Magico, TAD, Vivid, level of sound. All of which I have heard.
Since you like the KEF so much (me too), the other speaker I would consider at 1/2 the price is the KEF LS60. It won't be as good as the NS5000, but it is bleeding edge audio tech.