>>937386See this:
>>937491A 2hp saw is fine if you're bucking and limbing smaller stuff, but most 40cc saws make at least 3 HP and that extra power (at no additional weight) is much appreciated.
I buy used saws on craigslist, never paid more than $220 for pro-grade saws. Do a little research on what saws are in the class you want and look for those. If you can suss the good saws from the bad, you'll save a ton and have a more powerful, more reliable tool.