I am up to six right now. Only use two of them regularly, the Husky 562 and Echo 501. Of the others, one is the 461 for big wood and milling, one is an old Poulan antique from the 1970s, one is an Echo climbing saw I rarely use anymore, and then one Echo 40cc I use for odd jobs (demolition) or to loan out to friends. That 40cc Echo cuts great -- takes a licking and keeps on ticking.
What is a climbing saw? You might be winner of most saws. The Echo 501p is the one I use all the time to, I want my new Husky 550xp to last longer then 4 years this time.