FWIW, I used my new Ebay Chinese $100 35cc top handle yesterday. Great cutting easy starting little saw. I'm happy. World economy. Do I feel bad? Hell no.
I'm thinking of getting the G4500 ($119) with free shipping. Seems like good reviews. Does not come with bar and chain, so I want to get better quality bar and chain. What fits? 16" and 18". Stihl, Husky, other.
From all my research the CS4910 and 501P are identical except for a few inconsequential parts that have no bearing on performance. Save $$ and get a pro saw. Get the CS4910.
IMO, 50cc saws are the most appropriate generally speaking for most folks for firewood. Light weight with cutting ability for some pretty good size logs. CS 4910 or ms 261. My cutting buddy recently got a ms 361. Impressive for 50cc and easy to use.