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

I'll go one better by pure luck.  It was the early 2000's and I have a friend that is an audiofool and I have enjoyed his system over the years and also got me interested in Audiogon.  A pair of speakers I had been reading about but never heard, the Soliloquy 6.3's were on auction.  Won the auction and they have been the only thing that hasn't changed in my system.I haven't heard another speaker that I could afford that could beat them.  cleeds, the Infinity IRS Beta is one that I can't afford that did.

Boss302

I purchased my Aerial 10t 1996 model nearly 10 years ago. It's my last speaker.

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.