Why waste space? Lets take the bar where it ends up anyway when this subject comes up. An 880 or 3120 is about right for most firewood cutting, sometimes in real light duty work or extreemly soft wood a person can make due with 660 or 395." A 361 would would nice to have in the truck to blow off any remaining leaves before you start to cut.
LOL Seriously for what most around here cut for firewood a 60CC saw works well for people who take one saw to the woods. This would be your 361 or whatever Huskies XP saw is in that range. I find saws in this range to be easy on my back for limbing and powerfull enough for the felling and heavy bucking of fire wood size trees.