depends on your level of pulling. hydrostatic transmissions aren't the best for rugged pulling. I would reccomend you either get a 1200 or swap the engine to a stick frame if you are going serious in pulling with that 12
if your looking , find a 582 or 682 with a cast iron rear end. (IH built) it has a 16hp engine and manual trans.
I have a 582 and put a 18hp twin B&S in it. I dont pull with it. but it'll pull a 12" plow like nothing is back there, with enough wheel weights. and pushed snow like a dream.