New Speakers under consideration - but I’m afraid

I would approach it differently. Are you an analytical, impulsive or emotional person?

If you are analytical, you will find and likely appreciate the differences. From your post, you are not though.

The improvements have been significant but it benefitted the lower segment more than the higher tier. (NOBODY WILL AGREE WITH THIS HEHE) That said, you can buy speakers in the 5K neighborhood that beat your current speakers, emotional, impulsive or what not.  Personally none of these speakers on your list get me excited but they must be great. 

@immatthewj I stayed with the Von Schweikert brand, but bought a new pair from their current product line. 

Is the Mac amp you have on top tube or SS?

@ozzy62 Sorry, didn't see your comment. I only meant that I stayed with the Von Schweikert brand.  Poor choice of wording on my part. 

The advances in speaker technology has been very large. Yes you have much to gain. The safest bet will be the B&Ws since you like their speaker sound and they are still very bass heavy. But a trip is still worth the time and expense.

I would read avidly about your choices, then make a trip to the states to confirm. With your knowledge of your speakers and auditions you should be able to extrapolate to your audio environment.