Well, i suppose you could get yourself a pair of ....say Wilson Alexia Vs for about 70k. Set it next to your X3 and start comparing. Determine what beat out what after equalizing the caliber of electronics used for both speakers.
Later on/an year later, try selling that Alexia V and see if you can get 30k for it. If 3k is a big deal, a 40k Alexia loss could hurt the feelings a lot more, i’d think..