I guess I don't really upgrade much anymore. No real need to.
I guess for performance anymore. Example - I have crappy Avid Shorty 4 cantis on my cross rig right now. They just suck. I need better cantis - mainly because I have gone straight through more than 1 corner I had to take at high speed.
Scared the crap out of me and the cars that almost made me a hood decoration.
....so I guess that makes me a pouser....hmmm...I'm OK with that.