Where did you sink the most cash into?

Most of my cash is in music.
Only 10% or less in equipment.

I started collecting records as a teenager. In looking at my collection, without a doubt, the music collection would cost more than my stereo system by far. Original Blue Notes, Six-eye Columbia's, Original Contemporary's, Riversides, Roost's, Pacific Jazz ... and then there's the classical ... 

Speakers, analog, amp, digital, cables. But the system also sounded great when it was analog, amp, digital, speakers, cables. I don't really think about where a component falls dollar wise in the system.  I just buy what sounds good.  But I do think that if you like analog, you can really hear where the money went when you upgrade the front end. IMO. 

"Most of my cash is in music.
Only 10% or less in equipment."

Lots of bang for the buck then it would seem.  Well done!

Ever notice that really good systems are often accompanied by lots of software?   Records, CDs, what have you.   Its usually a pretty good practical indicator of whether things  worked out well or not.