Looking for a saw for a young man to learn with. Only needs to be lightweight and reasonably priced since there are several mid sized saws around now. I have an MS250 they like but I've also looked at an Echo 4510 and 4910. The 4510 is 45 cc as is my MS250. The 4910 is 50cc and a little lighter. I'd like to hear any experience you have with these models. Either brand can be purchased from servicing dealers the same distance away.