I would appreciate some speaker suggestions

I haven't been involved in stereo for a quarter of a century. I am going to assume that speakers have made some significant strides in this time frame. I currently listen to four Kef 105.2 speakers. I have them set up where I can switch between 2 or 4 speakers (1-2 per side in stereo) depending on the material I listen to. I have no issue with buying used or older speakers. Ten year old speakers would be new to me. In general, I like the sound of the old Kef's especially the midrange but I believe the high and low end could be better. I appreciate any help and insight you can give me on a speaker upgrade. I would be playing both CDs and records. I listen to all types of music. My budget is about 2.5K for the speakers but would prefer to spend less than 2K. Once again, thanks for the help. Regards, Gary