I'll add my 2 cents:
Not all Craftsman Snow Throwers are created equally. Think of their other house brand, Kenmore. Certain refrigerators under the Kenmore name are really Whirlpools, while others may be Frigidaires, et al.
In terms of the Sears snow equipment, the 11.5 HP "88115" unit is apparently made by Electrolux (same as Husqvarna/Poulan) and seems to have much higher build quality than the other Craftsman units, many of which are made by MTD. I'm not sure which, if any, other Craftsman models are made by Electrolux.
See previous discussion.
For what it's worth, I think the Craftsman 88115 offers a lot of bang for the buck. (11.5 HP Briggs Intek/30"/Power Steering) It's usually on sale for anywhere from $1000 to $1100.