The oregon 40 volt is the only way to go IMO. Have had one for 3years now. Have personally only seen them for sale on-line. Looked in various stores for one before I bought mine with no luck. Will cost you in the neighborhood of $400, but worth it to me. Has its own manual sharpening lever. Bar & chain require no tools for removal. Nothing out there like it that I know of. Only complaint i have is wish it would turn slightly higher on the rpms'. The extreme sharpness of the chain makes up for this though. Wicked sharp teeth.