Okay, a couple of other brands to look at if toughness and durability is the key.
Both were initially made by the same outfit who, reportedly, originally made for Cuisinart. Not sure, just what I heard.
Magimix (3200XL) is one that you can look for. Around $450 and up though used and refurbished can be bought substantially cheaper. They are considered the low end of the ...
Robot Coupe which has many models, starts around $890 (I think) and can go up for thousands of dollars. Found in your serious restaurants where they need tough machines that will do lots and lots, then lots more after that. If you happen to find one sitting in a thrift shop or put up cheap on craigslist, you might want to grab it.