Have you ever tried a pair of speakers and said this Is the last thing I will ever need.

Acoustic Zen Crescendo mkii.
Done!

I have been an Alon/Nola guy since '94 and also dabbled with other speakers when I explored 300B SE playback namely the Cabasse Ferella 401 and a few bookshelf models, those being Fried and NHT but mainly stuck with the Alon/Nola's over the years. 

At the last few years of RMAF, I have been mightily impressed everytime I heard a room with Vandersteen speakers so when a local deal came up for a pair of Quatro Wood speakers, all it took was one listen and they came home with me. RV's approach to bi-amping is very smart with extreme flexibility, not to mention the 11 band subwoofer equalizer and Q control which allows one to match the speaker to the room with outstanding results. They are an easy load to drive and I've had excellent results with both an EICO 2050 int. amp and a Pass Labs Aleph 3.

Needless to say, the Quatro Woods are most likely the last speakers I'll buy.

KEF reference 3
Gamut M7

Done.

I was a dealer for TAD a few years ago and still have the CR1'S.   I can't imagine ever getting rid of them even if I move to another speaker.  I augmented them with subs and super tweeters but I don't often comeback from an audio show and think I've heard something that surpasses them, or even comes close.  They're not for everyone but to me they present music the way I hear it live and up close- unamplified.  
However I'm tempted by Magico's and soundlabs.  

Yes!!  I had many expensive and varied cutting edge speakers.  Around 2004 I was living in a small condo for temporary housing between homes.  Enter the Totem Forest Loudspeakers.  Gave them up when I moved to our new home.  They haunted me ever since so....I finally got the new Totem Forest Signatures and I have found my happy place again except they are vastly superior to my old Forest's.