I have a pair of BM Compact MKIII and BM5 MKIII's which were replaced by the LYD's and have been quite impressed with both...Dynaudio Excite X18 vs Dynaudio LYD 7:
-Cabinet dimensions virtually identical
-Bass extension virtually dentical (44 hz vs 45 hz)
-~ $1758 USD (X18) vs $1338 USD (LYD 7)
...and the LYD 7 is active, built-in amps, DSP crossover, and adjustable EQ.
Seems like the LYD 7 is much more bang for the buck than the X18.
Or am I missing something?