If you are felling and bucking 18" or larger hardwood regularly, go for the 441. You will never regret it. I have the 036 and though its an ideal firewood saw, it is not the saw I'd grab to fell or buck with (I have a 660 too). The 441 will be spot on for felling or bucking or limbing and will serve as a great firewood saw too. Put a 20" to 25" bar on it and you are covered for most everything. Out here, there's lots of conifers, so most guys are running 28" and 32" bars on their 441's. If you have to have 1 saw, get that one. If money is the issue, see if you can scrape the pennies together for the 440. If not, then do the 361. Try the heft of all the saws with the same bar on them. I purchased my 036 for firewood and it was ideal, except for wood over 18" and when I needed to fell trees.
All that being said, you really can't go wrong with either saw. Don't forget the Husky 372 if your money won't get you into the 441. You can probably pick it up through Bailey's for about the price of a 361. I'd definitely do that if I had to make the choice and didn't have another saw in the arsenal.