Good question...I have recently tried some Mulidine Allegreto (French)costing 1500 Euros...Not any better...
i am doing the same thing. i have a pair of KEF 104/2 and i have not had a single problem, but want to upgrade. i have auditioned several speakers in my system and for about the same money as the 104's cost back in their day, modern speakers are a big improvment. i just recently tries a pair of B&W 7NT and the imaging and detail blew away my KEFs. the bass was a little less, but tighter. the 104's were a great speaker in their day, but the new stuff is better. the new thiels also outperformed my old KEFs.
The BMW N05 very very good, Martin logan aeon,Totem one,
Norh speakers marble box, they are very good, the 6.9
marble $950. I use to own 104/2 they are very good.
but with all the speakers above, THERE IS NO MATCH.
I sold mine 9 years ago as soon as i heard the logans
quest.If you want to inquire on norh, www.norh.com.
i have no relation with norh, its one way of thanking
them for the nice speaker they sold me.
CDM 7NT...just tried those at home a while ago...those are great speakers but quiet different from the 104/2..I much prefer the warmer sound of the 104/2. I found the 7NT a little tiring for long term sessions...I found those speakers really different...Since my electronics tend to be on the bright side, the BW were not a good match...I won't say the KEf are better...I just prefer them...