Which purchase tipped you into nirvana.

After owning some excellent gear, which purchase was it that put a big smile on your face?
In chronological order: 1) 1975 - Stax Earphones; 2) 1986 - ARC SP10II pre-amp, my first piece of tubed equipment; 2007 - Silverline Bolero speakers.
I think I agree with Tvad, if I remember correctly. It has been a while since I started and I can't remember some things from yesterday never mind 30 to 40 years ago.