Ever since i had gotten out of the military, i would upgrade whenever it made sence economically.
Several times i had a chance to upgrade in the past 2 years and i diddnt because i had other priorities, Before that i would Make 1-2 major purchases in my stereo over the course of the year.
No all i have is radioshack speakers, a decent preamp, and a denon amplifier that keeps producing occasional static when everything else is off, i keep expecting it to explode, so right now i really really have an upgrade bug.
Once i get myself a decent rig i will probably go another year before any new purchases.
First i need new speakers, amp, pre, etc. probably gonna build it myself. Tube stuff most likely.
Maybe a year after that i will look into getting a turntable some some blues on vinyl.