Have you reached your end point with this addictive hobby?

Yeah, I'm done.  I've gone as far as I care to.  I have a 7.2.4 system that works perfectly fine.  I've had brands such as Marantz, Rotel, Parasound, PSB, SVS, Elac, Outlaw Audio and Emotiva.  

I don't care to upgrade and spend more, that money can be spent elsewhere.

Almost done. . . I just returned from AXPONA and had a fantastic time. It’s a tradition for my family to go each year and love every minute. We heard many amazing expensive systems and it was really exciting to hear the flagship Magicos along with gear well worth over $2M in total. I never thought I’d see a unicorn in real life, what a great experience.

I’ve walked away each year thinking about the system I heard that really surpasses mine and get home and play the same music and actually prefer my system because I have all the dynamics, staging, and musicality I critically listened to and more. For the first time I have no upgrade itch, except to add BACCH but even without it I’m thrilled with my system. I would challenge anyone to A/B my set up with anything I heard at AXPONA. Money doesn’t buy perfection; being thoughtful, deliberate, and informed can lead to exceptional results. I’ll keep the search on for great recordings and new artists to listen to :)

- Steve 

To answer the OP:

No, I'm not at the end yet, but I am part of the way there, and all of the gear that I have gone through has given me clarity about what kind of sound I like. 

Very close.

I've thought so, several times.....

Each time I must be getting a little closer to nirvana, the gains are getting smaller and costing more. Time to play some of the less often heard recordings and enjoy what I have.