Best Upgrade you had?

Changing the way in which my system was set up in the room and installing a projector/screen in replace of the big RPTV was the biggest upgrade. This maximized the potential of my Kharma 3.2s and my subsequent amp upgrades.

Köchel K-300 loudspeakers, Atma-Sphere MP-1 preamp, or Audio Synthesis DAX Discrete DAC. It's a pretty tough call deciding between the three.

Losing the live in Girlfriend (of 3 years): So I could buy my Ferrari Fly Yellow Wilsons and ditch my Audi for a Honda! A couple months later a pair of Lamm's. Oatmeal and Raman Noodles allows me to use all my disposable income for stereo equipment! Oh yeah Turning the master bedroom into a dedicated listening room became possible (I don't care about sleeping in the guest bedroom!)

Early upgrades had a bigger impact; I've been working at diminishing returns in recent years. Probably my best was in 1996, replacing Rectilinear IIIs (bought in 1969) with Thiel 3.6s. The sound improvement was quite noticable. (Heh, heh, heh) Yup.

Speakers, without a doubt. Made the largest, most profound change in my system top to bottom, back and forward--the whole nine. Went from the Revel M20s (which I loved) to the Harmonic Precision Caravelles. Huge difference in $$, but the sound?! My rig is there...got some pretty good electronics/etc. as well.....peace, warren