I would strongly recommend looking at the 5 series Husky saws. Power to weight ratio can't be beat. They start with the 550, then 555 then the pro version 562 which has to be used to be believed. I have to admit I'm a little biased toward Husky from a very long time ago. Raced 'em in various configurations from stock to full mod with alcohol, stroked cranks, expansion chambers etc. ........those were the days. Had an old 77 that won the under 5 cube class at the worlds in Green Bay back in the day and dang near got my face kicked in for a smart remark I made to an old timer that I beat......... lol Anyway, if you are looking a a serious 3.5-4.0 cube saw you won't go wrong with a Husky. The 562 as I said is unbelievable for it's size and weight. Sink the full length of a 20" bar in a piece of oak and just flat get it. Send me a PM. I still have some pretty good connections in the saw industry and if you're looking for a deal I can help.