A spectroradiometer for display calibration (Colorimetry Research or equivalent) and Minolta colorimeter
Hobby wise: Not necessarily the pinnacle but a set of Magnepan speakers and an amp good enough to drive them. I just like the sound of them but not necessarily the peak for all enthusiasts.
Also a Stax headphones with a matching high voltage driver. Again, a niche product that isn't at the top of all headphone enthusiasts, but I like them. Alternative, Audeze LCD series. Guess the trend is that I like planars and electrostatics.