For me it was upgrading from the PSR-500 to the PSR-2000. The 2000 was light years ahead of anything on the market at the time.

Gary cool
_________________________
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)