MacLaren
Addicted to ArboristSite
Pro is relative to the job at hand. Compared to the Poulan it is a giant leap. If you are only cutting down a handful of trees 2+ feet in diameter the saws listed will do just fine. Don't get swept up in the "70cc or nothing" crowd. You can cut down a 3 foot diameter tree with an 18" bar.
If you are looking at the MS290 and 450, based on those 2 saws alone I would get the MS290. Parts are easy to find and cheap, not to mention that it has the CC advantage over the 450. I know you are looking in a specific price range, but the 455 or 460 would be a good choice too. They might be a little more expensive but it is a more capable saw and more comparable to the MS290.
I hear ya PB, but a 36" tree w/an 18" is a lot of work.... :msp_crying: