The best is "The one I own"! I suspect most people buy the best (in their mind), and if it isn't the best, they manage somehow to get the best.
I don't mean to be a smart***, but there isn't much of a good answer other than there are many saws out there that if treated with respect and cared for, will be 'your best'. If mistreated, abused, etc, they all will fail your expectations.
I have the same Stihl that I bought in 1975, and it doesn't miss a beat anytime, anywhere. Knock on wood, but it has been the most impressive saw I have owned, or borrowed, or have worked around, bar none. I wouldn't knock another brand, because I think I could get the same performance out of another brand that I have gotten out of my Stihl. You treat them right, they will likely treat you right.
I had an occasion to use the Deere saw (post homelite and remington, I believe) they are selling now, and was very pleased with its performance and handling. If mine misses a beat, I will buy a new one, and don't know if I could convince myself to buy anything but another Stihl. I don't think it will have to last as long as the one I have now though. That would be another 28 years. Hmmm? I be 92 then. /forums/images/graemlins/tongue.gif /forums/images/graemlins/grin.gif