I used a Homie 923, that was a good saw, but then I got a Jonsered 70E. I loved that saw. but I heard that the ign systems on them failed regularly and had become hard to get, so I traded for a 670. Great saw. Along the way, I've also had an Echo 702 and 1001 (702 was Ok, 1001 was too big and heavy for firewood)and a few others I forget.
I stuck the 670 last spring, and am collecting parts to rebuild...I have a desire to find a new or very good Husky 272 jug for it, send it to Dennis for his personal incantations, and stick the covers from my 625 on it, just to scare the shorts off of my bro-in-law with his much-bragged-about 039 stihl.
Ha!
Currently am getting by with 2149 Jons, 2055 Jons, aforementioned 625 Jons, and 395 Husky for regular use. Fave? Probably split between the 2149 and 2055. light, fast, and easy on the back for long sessions. 625 is a real good saw, pretty good torque, but not a max speed screamer. 395 was purchased for milling and too much saw for firewood on a constant basis.