Pioneer Partner P45 . 4.5 cubes of grunt. 36" bar with skip chain. Will flat suck you into and THROUGH that saw cut if you're sleepin' ! Got scars ta prove it ! I always file my own chains, take 3-4 with me for quick change in the woods.
Back in the early 80's I firewooded for a living for 3 1/2 years. 350-400 cord in a 4 month cutting season. No wonder I hurt like hellions in the morning !