Advice on Sterling LS3/6

I learned on a UK Spendor forum that Derek Hughes is retiring and closing down Sterling Broadcast.  They are clearing out inventory at excellent prices - mostly LS3/5a V2 and V3, but also a few other models.  I'm looking at the LS3/6. The regular price for the LS3/6 is $6000/pair  and the sale price is $3300 (plus $600 shipping to the US).

One pair of LS3/6 have been shipped to Jeff Stake, a dealer in Indiana.  I told Jeff I may be interested, but I've never heard them.  I could drive down to audition them (I live in Chicago) but I thought I'd check on Agon to see if others have experience with them.

I currently have Spendor SP3/5 R2 speakers in a small room.  The LS3/6 would go in a new listening room, 17x23 ft.  I will be using them with Bacch4Mac and a solid state amp (undecided, but probably Starcrimson monoblocks).  Qobuz is the source, over a Bluesound streamer with LPS and English 8 switch.  I'll use the Bacch's RME DAC.  I like vocals (Melody Gardot), Argentine Tango (Gotan Project), Van Morrison, Duke Ellington.  Seldom crank it up.

To my mind, the real alternative is a Harbeth 30.x or C7ES3.  At Axpona I heard a Spendor Classic series (not sure which) that I really liked but the cost is beyond my budget (over $10k).  Any comments would be welcome.

Latest review of the Stirling LS3/6 is from The Absolute Sound (where the retail price is listed as $9995):